2025, 2024, 2023, 2022, 2021, 2020, 2019, 2018, 2017.

    

2025

1. Ilievska, I., Ormanova, M., Stoyanov, B., Andreeva, A.

   Influence of the scanning frequency on the surface topography of electron-beam modified Ti6Al4V alloy.

   Journal of Physics: Conference Series, 2994, 2025, 012014. https://iopscience.iop.org/article/10.1088/1742-6596/2994/1/012014

2. Kaisheva, D., Kotlarski, G., Ormanova, M., Stoyanov, B., Dunchev, V., Anchev, A., Valkov, S.

   Effect of Beam Power on Intermetallic Compound Formation of Electron Beam-Welded Cu and Al6082-T6 Dissimilar Joints.

   Eng, 6, 1, 2025, 6. https://www.mdpi.com/2673-4117/6/1/6

3. Kotlarski, G., Kaisheva, D., Ormanova, M., Atanasova, M., Anchev, A., Dunchev, V., Stoyanov, B., Valkov, S.

   Electron Beam Welding of Dissimilar Ti6Al4V and Al6082-T6 Alloys Using Magnetron-Sputtered Cu Interlayers.

   Crystals, 15, 2025, 373. https://www.mdpi.com/2073-4352/15/4/373

4. Kotlarski, G., Ormanova, M., Valkov, S.

   Formation and characterization of ER4043 welding wire layers by CA-WAAM on copper substrates.

   Comptes rendus de l'Academie bulgare des Sciences, 78, 1, 2025, 19-26. https://www.proceedings.bas.bg/index.php/cr

5. Kotlarski, G., Ormanova, M., Nikitin, A., Parasar, A., Ossenbrink, R., Doynov, N., Valkov, S., Michailov, V.

   Wire arc deposition of specimens using a special-designed aluminum-cored wire with CNTs.

   Journal of Physics: Conference Series, 2994, 2025, 012024. https://iopscience.iop.org/article/10.1088/1742-6596/2994/1/012024

6. Kotlarski, G., Stoeva, D., Dechev, D., Ivanov, N., Ormanova, M., Mateev, V., Marinova, I., Valkov, S.

   Review on Metal (-Oxide, -Nitride, -Oxy-Nitride) Thin Films: Fabrication Methods, Applications, and Future Characterization Methods.

   Coatings, 15, 2025, 869. https://www.mdpi.com/2079-6412/15/8/869

7. Nedyalkov, N., Stankova, N., Padikova, F., Valkov, S., Atanasova, G., Dilova, T., Aleksandrov, L.

   Resistive heater element based on a conductive line in AlN ceramic fabricated by laser processing.

   Materials, 18, 2025, 2861. https://www.mdpi.com/1996-1944/18/12/2861

8. Nikov, R., Nedyalkov, N., Valkov, S., Koutzarova, T., Aleksandrov, L., Atanasova, G., Grochowska, K.

   Nanosecond laser processing of Titanium in organic liquids as a method for obtaining Titanium Carbide coatings.

   Materials, 18, 2025, 598. https://www.mdpi.com/1996-1944/18/3/598

9. Rabadzhiyska, S., Dechev, D., Ivanov, N., Shipochka, M., Atanasova, G., Strijkova, V., Katrova, V., Dimcheva, N.

   Mechanical, Tribological, and Corrosion Behavior of Magnetron-Sputtered VN Coatings Deposited at Different Substrate Temperatures. Metals.

   15, 2025, 955. https://www.mdpi.com/2075-4701/15/9/955

10. Stoeva, D., Kotlarski, G., Dechev, D., Ivanov, N., Ormanova, M., Mateev, V., Marinova, I.

    Formation and electrical conductance of TiO2 coatings on Cu substrates.

    Journal of Physics: Conference Series, 2994, 2025, 012025. https://iopscience.iop.org/article/10.1088/1742-6596/2994/1/012025

11. Valkov, S., Kotlarski, G., Nedyalkov, N., Koutzarova, T., Ormanova, M., Stoyanov, B., Ilievska, I.

    Advanced research directions in electron beam welding and surface modification of metallic alloys at the Centre of Competence “Smart Mechatronic, Eco- and Energy Saving Systems and Technologies“.

    Proceedings of the International Scientific Conference "Mechatronic, Eco- and Energy Saving Systems and Technologies" 2025, ISSN:2815-4924, 160-164. https://smeest.eu/images/conferenc%D0%B5/sept_2025_gabrovo/MEEST-2025-Gabrovo.pdf

12. Valkov, S., Kotlarski, G., Nedyalkov, N., Koutzarova, T., Ormanova, M., Stoyanov, B., Ilievska, I.

    Electron beam surface treatment and welding at the Centre of competence "Smart Mechatronic, Eco- and Energy Saving Systems and Technology“.

    Proceedings of the International Scientific Conference "Mechatronic, Eco- and Energy Saving Systems and Technologies", 2025, ISSN:2815-4924, 153-159. https://smeest.eu/images/conferenc%D0%B5/sept_2025_gabrovo/MEEST-2025-Gabrovo.pdf

13. Valkov, S., Kotlarski, G., Parshorov, S., Ormanova, M., Padikova, F., Stoyanov, B., Parshorov, I.

    Electron Beam Surface Treatment and Its Impact on the Plasticity of Fe-Based High-Entropy Alloy.

    Coatings, 15, 2025, 477. https://www.mdpi.com/2079-6412/15/4/477

14. Valkov, S., Padikova, F., Parshorov, S., Parshorov, I.

    Crystallographic texture formation at Co-Cr-Mo alloys treated by a scanning electron beam.

    Journal of Physics: Conference Series, 2994, 2025, 012029. https://iopscience.iop.org/article/10.1088/1742-6596/2994/1/012029

15. Ilievska, I. , Dechev, D. , Ivanov, N. , Anchev, A. , Padikova, F. , Valkov, S.

    INFLUENCE OF BEAM POWER ON THE POSSIBILITY OF OBTAINING OF TI-NB ALLOYS BY THE ELECTRON BEAM SURFACE MODIFICATION.

    Proceedings of the International Scientific Conference UNITECH'2025, Technical University of Gabrovo, 2025, ISSN:3033-1404, 258-262. https://unitech.tugab.bg/images/2025/dokladi/13-Chemistry%20Physics%20and%20Ecology/p261_s13_u258_id336.pdf

16. Padikova, F.

    STRUCTURE FORMATION OF COMPOSITE COATINGS BY ELECTRON BEAM MODIFICATION

    Proceedings of the International Scientific Conference UNITECH'2025, Technical University of Gabrovo, 2025, ISSN:3033-1404, 233-238. https://unitech.tugab.bg/images/2025/dokladi/13-Chemistry%20Physics%20and%20Ecology/p267_s13_u233_id335.pdf

17. Nikolova, M., Handzhiyski, Y., Dimitrova, T., Andreeva, A., Valkov, S., Ormanova, M., Apostolova, M.

    Biological Response and Antimicrobial Behaviour of Sputtered TiO2/Cu Coatings Deposited on Ti6Al4V Alloy

    Coatings, 15, 2025, 1341. https://doi.org/10.3390/%20coatings15111341

18. Parshorov, S., Valkov, S., Ormanova, M.

    Dynamic relaxation spectra of heat-treated Beryllium Bronze strip samples

    International Journal “NDT Days”, 8, 1, 2025, ISSN:2603-4018, 26-29. https://www.ndt.net/article/NDTDays2025/papers/JNDTD-v8-n1-a05.pdf

19. Parshorov, S., Valkov, S., Ormanova, M.

    Influence of heat treatment on the damping properties of strip of Mn-Cu alloys

    International Journal “NDT Days”, 8, 2, 2025, ISSN:2603-4018, 65-69. https://www.ndt.net/article/NDTDays2025/papers/JNDTD-v8-n2-a01.pdf

20. Petrov, N., Ormanova, M., Zhelezarov, I.

    Effect of the infill architecture on the mechanical properties of 3D printed PETG samples

    Journal of the Technical University of Gabrovo, 71, 2025, 6-12. https://izvestia.tugab.bg/titles/effect-of-the-infill-architecture-on-the-mechanical-properties-of-3d-printed-petg-samples

21. Petrov, N., Ormanova, M., Zhelezarov, I.

    Optimization study on the infill density of 3D printed PETG components

    Proceedings of the International Scientific Conference UNITECH'2025, Technical University of Gabrovo, 2025, ISSN:3033-1404, 184-190. https://unitech.tugab.bg/images/2025/dokladi/13-Chemistry%20Physics%20and%20Ecology/p168_s13_u184_id190.pdf

22. Stoyanov, B., Ormanova, M., Valkov, S., Anchev, A.,, Dunchev, V., Kaisheva, D., Kotlarski, G.

    Technologies for electron beam welding of copper and aluminum alloy

    Journal of the Technical University of Gabrovo, 70, 2025, 3-7. https://izvestia.tugab.bg/titles/technologies-for-electron-beam-welding-of-copper-and-aluminum-alloy

23. Veleva, L., Velizarova, R., Valkov, S.

    Electron beam techniques for the fabrication of Ti-Ta coatings

    Proceedings of the International Scientific Conference UNITECH'2025, Technical University of Gabrovo, 2025, ISSN:3033-1404, 236-241. https://unitech.tugab.bg/images/2025/dokladi/13-Chemistry%20Physics%20and%20Ecology/p274_s13_u236_id343.pdf

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2024

1. Ilievska, I., Ivanova, V., Dechev, D., Ivanov, N., Ormanova, M., Nikolova, M., Handzhiyski, Y., Andreeva, A., Valkov, S., Apostolova, M.

   Influence of Thickness on the Structure and Biological Response of Cu-O Coatings Deposited on cpTi.

   Coatings, 14, 2024, 455. https://www.mdpi.com/2079-6412/14/4/455

2. Kaisheva, D., Kotlarski, G., Ormanova, M., Anchev, A., Dunchev, V., Stoyanov, B., Valkov, S.

   Electron Beam Welding of Copper and Aluminum Alloy with Magnetron Sputtered Titanium Filler.

   Crystals, 14, 9, 2024, 752. https://www.mdpi.com/2073-4352/14/9/752

3. Kaisheva, D., Dunchev, V., Anchev, A., Stoyanov, B., Ormanova, M., Atanasova, M., Todorov, V.

   Effect of the beam oscillation on the structure and mechanical properties of electron beam welded joints of Ti₆Al₄V and Al₆0₈₂-T₆ alloys

   Journal of Physics: Conference Series, 2710, 2024, 012005. https://iopscience.iop.org/article/10.1088/1742-6596/2710/1/012005

4. Kotlarski, G., Ivanov, N., Dechev, D., Valkov, S., Mateev, V., Marinova, I.

   Structure and impedance of TiN coated 304L SS substrates.

   Journal of Physics: Conference Series, 2710, 2024, 012004. https://iopscience.iop.org/article/10.1088/1742-6596/2710/1/012004

5. Kotlarski, G., Kaisheva, D., Ormanova, M., Stoyanov, B., Dunchev, V., Anchev, A., Valkov, S.

   Improved Joint Formation and Ductility during Electron-Beam Welding of Ti₆Al₄V and Al₆0₈₂-T₆ Dissimilar Alloys.

   Crystals, 14, 2024, 373. https://www.mdpi.com/2073-4352/14/4/373

6. Kotlarski, G., Kaisheva, D., Anchev, A., Ormanova, M., Stoyanov, B., Dunchev, V., Valkov, S.

   Electron-Beam Welding of Titanium and Ti₆Al₄V Using Magnetron-Sputtered Nb, V, and Cu Fillers.

   Metals, 14, 2024, 417. https://www.mdpi.com/2075-4701/14/4/417

7. Kotlarski, G., Ormanova, M., Nikitin, A., Morozova, Iu., Ossenbrink, R., Michailov, V., Doynov, N., Valkov, S.

   Microstructural and Mechanical Properties of CAP-WAAM Single-Track Al5356 Specimens of Differing Scale.

   Machines, 12, 1, 2024, 72. https://www.mdpi.com/2075-1702/12/1/72

8. Kotlarski, G., Ormanova, M., Nikitin, A., Morozova, Iu., Ossenbrink, R., Michailov, V., Doynov, N., Valkov, S.

   Structure Formation and Mechanical Properties of Wire Arc Additively Manufactured Al₄0₄₃ (AlSi₅) Components.

   Metals, 2, 14, 2024, 183. https://www.mdpi.com/2075-4701/14/2/183

9. Ormanova, M., Kotlarski, G., Dechev, D., Ivanov, N., Stoyanov, B., Valkov, S.

   Duplex Surface Modification of M2 High-Speed Steel.

   Coatings, 14, 2024, 798. https://www.mdpi.com/2079-6412/14/7/798

10. Ormanova, M., Kotlarski, G., Kaisheva, D., Nikitin, A., Ossenbrink, R., Doynov, N., Valkov, S., Michailov, V.

    Investigation of the thermal gradients formed during the process of cooling of WAAM built Al99.7 specimen.

    Journal of Physics: Conference Series, 2710, 2024, 012038. https://iopscience.iop.org/article/10.1088/1742-6596/2710/1/012038

11. Valkov, S., Kotlarski, G., Parshorov, S., Ormanova, M., Stoyanov, B., Padikova, F., Parshorov, I.

    Effect of Electron Beam Surface Modification on the Plasticity of Inconel Alloy 625.

    Coatings, 14, 3, 2024, 268. https://www.mdpi.com/2079-6412/14/3/268

12. Dichev, D., Diakov, D., Zhelezarov, I., Valkov, S., Ormanova, M., Dicheva, R., Kupriyanov, O.

    A Method for Correction of Dynamic Errors When Measuring Flat Surfaces.

    Sensors, 24, 2024, 5154. https://www.mdpi.com/1424-8220/24/16/5154

13. Nikolova, M., Ilievska, I., Handzhiyski, Y., Ivanova, V., Apostolova, M.

    Characterization and Antibacterial activity of co-sputtered Cu-doped TiO₂ coatings deposited on Ti₆Al₄V alloy.

    Journal of Physics: Conference Series, 2710, 2024, 012020. https://iopscience.iop.org/article/10.1088/1742-6596/2710/1/012020

14. Nikolova, M., Tzvetkov, I., Dimitrova, T., Ivanova. V., Handzhiyski, Y., Andreeva, A., Valkov, S., Ormanova, M., Apostolova, M.

    Effect of Co-Sputtered Copper and Titanium Oxide Coatings on Bacterial Resistance and Cytocompatibility of Osteoblast Cells.

    Nanomaterials, 14, 2024, 1148. https://www.mdpi.com/2079-4991/14/13/1148

15. Petrov, N., Ormanova, M., Zhelezarov, I..

    POROSITY DISTRIBUTION AND MICROHARDNESS OF A COLD ARC PULSE™ WIRE ARC ADDITIVELY MANUFACTURED AlSix MECHANICAL PLATE.

    Journal of the Technical University of Gabrovo, 68, 2024, ISSN:1310-6686, 1-7

16. Rabadzhiyska, S., Dechev, D., Ivanov. N., Ivanova. T., Strijkova, V., Katrova, V., Rupetsov, V., Dimcheva, N., Valkov, S.

    Wear and Corrosion Resistance of ZrN Coatings Deposited on Ti6Al4V Alloy for Biomedical Applications

    Coatings, 14, 2024, 1434., https://doi.org/10.3390/coatings14111434

17. Parshorov, S., Valkov, S., Ormanova, M., Parshorov, I.

    High Damping Related to Anelasticity of Beryllium Bronze

    International Journal "NDT Days", 7, 2, 2024, 62-66. https://www.bg-s-ndt.org/journal/vol7/JNDTD-v7-n2-a02.pdf

18. Parshorov, S., Valkov, S., Ormanova, M., Parshorov, I.

    High Damping Related to Micro-Plasticity in Beryllium Bronze

    International Journal "NDT Days", 7, 3, 2024, 105-110. https://www.bg-s-ndt.org/journal/vol7/JNDTD-v7-n3-a01.pdf

19. Stoyanov, B., Ormanova, M., Valkov, S., Anchev, A., Dunchev, V., Kaisheva, D., Kotlarski, G.

    Technologies for electro beam welding of copper and aluminum alloy

    Proceedings of the International Scientifiv Conference UNITECH'2024, Selected papers, 2024, Technical University of Gabrovo, 2024, 144-149. https://unitechsp.tugab.bg/images/2024/7-METMID/s7_p144_v1.pdf

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2023

1. Dimov D. A, Stankova N., Karaivanova D., Karashanova D., Georgieva B., Avramova I., Petrov M., Valcheva E., Avdeev G., Ivanov K., Milenov T.

   Modification of microcrystaline graphites by pulsed laser ablation in a flow mode suspension

   Journal of Physics: Conference Series 2487, 2023, 012010 https://iopscience.iop.org/article/10.1088/1742-6596/2487/1/012010/pdf

2. Kaisheva, D., Dunchev, V., Kotlarski, G., Stoyanov, B., Ormanova, M., Todorov, V., Atanasova, M., Valkov, S.

   Structure and mechanical properties of Cu/Al6082T6 joints produced by welding with scanning electron beam

   Journal of the Technical University of Gabrovo, 66, 2023, 46-49 http://izvestia.tugab.bg/index.php?m=20&tom=24

3. Kaisheva, D., Stoyanov, B., Dunchev, V., Kotlarski, G., Ormanova, M., Valkov, S.

   Welding of titanium and aluminum alloys using oscillating electron beam and niobium filler

   Proceedings of Unitech 2023, 2, 2023, 363-367.

4. Kotlarski, G., Ivanov, N., Dechev, D., Ormanova, M., Valkov, S., Mateev, V., Marinova, I.

   Influence of magnetron sputtered TiN and VN coatings on the electrical impedance of aluminium electrodes

   Comptes rendus de l'Acadйmie bulgare des Sciences, 76, 9, 2023, 1335-1342https://www.proceedings.bas.bg/index.php/cr/article/view/379

5. Kotlarski, G., Kaisheva, D., Ormanova, M., Stoyanov, B., Dunchev, V., Anchev, A., Valkov, S.

   Electron-Beam Welding of Titanium and Ti₆Al₄V Alloy

   Metals, 13, 6, 2023, 1065 https://www.mdpi.com/2075-4701/13/6/1065

6. Kotlarski, G., Ormanova, M., Valkov, S., Andreeva, A., Bezdushnyi, R., Mateev, V., Marinova, I., Petrov, P.

   Influence of Transition Metal-Nitride Thin Films on the Electrical Contact Resistance of Copper Substrates

   Journal of Physics: Conference Series, 2487, 2023, 012033.https://iopscience.iop.org/article/10.1088/1742-6596/2487/1/012033

7. Kotlarski, G., Ormanova, M., Nikitin, A., Ossenbrink, R., Doynov, N., Valkov, S., Michailov, V.

   Structure, morphology and hardness a WAAM built Al99.7 specimen

   Proceedings of Unitech 2023, 2, 2023, 349-353.

8. Nikolay Tyutyundzhiev, Hristo Nitchev, Christo Angelov, Todor Arsov, Konstantin Lovchinov, Asen Mutafov

   Variation of UV-A/UV-B daily profiles depending on locations and altitude

   Journal of Physics: Conference Series 2436, 2023, 012008. https://iopscience.iop.org/article/10.1088/1742-6596/2436/1/012008/meta

9. Ormanova, M., Kotlarski, G., Stoyanov, B., Valkov, S.

   Surface modification of Ti6Al4V alloy by continuous electron beam

   Journal of Physics: Conference Series 2487, 2023, 012037. https://iopscience.iop.org/article/10.1088/1742-6596/2487/1/012037

10. Ormanova, M., Stoyanov, B., Nedyalkov, N., Valkov, S.

    Impact of Beam Deflection Geometry on the Surface Architecture and Mechanical Properties of Electron-Beam-Modified TC4 Titanium Alloy

    Materials 16, 2023, 5237. https://www.mdpi.com/1996-1944/16/15/5237

11. Padikova, F., Nedeva, D., Dunchev, V., Stoyanov, B., Ormanova, M., Nedyalkov, N., Valkov, S.

    Fabrication and Characterization of Titanium Borides by Electron Beam Surface Alloying

    Coatings 13(11), 2023, 1941. https://www.mdpi.com/2079-6412/13/11/1941

12. Petrov, M., Slavov, L., Stankulov, T., Karamanova, B., Milenov, T., Dimov, D., Avramova, I.

    Transforming Chimney Soot via Stochastic Polymerization for Active Electrode Coating

    Coatings 13(8), 2023, 1354. https://www.mdpi.com/2079-6412/13/8/1354

13. Rabadzhiyska, S., Kotlarski, G., Valkov, S., Ormanova, M., Strijkova, V., Dimcheva, N., Shipochka, M., Petrov, P.

    Study of diamond - like carbon coatings for biomedical applications produced by electron-beam physical vapor deposition

    AIP Conference Proceedings 2803, 2023, 040014. https://doi.org/10.1063/5.0143804

14. Valkov, S., Nedeva, D., Dunchev, V., Padikova, F., Ormanova, M., Stoyanov, B., Nedyalkov, N.

    Fabrication and Characterization of Ti/TiC Composite Layers by an Electron-Beam Surface Modification

    Coatings 13, 2023, 951. https://www.mdpi.com/2079-6412/13/5/951

15. Anchev, A., Kaisheva, D., Kotlarski, G., Dunchev, V., Stoyanov, B., Ormanova, M., Atanasova, M., Todorov, V., Daskalova, P., Valkov, S.

    Welding of Ti6Al4V and Al₆0₈₂-T₆ Alloys by a Scanning Electron Beam

    Metals, 13, 2023, 1252. https://www.mdpi.com/2075-4701/13/7/1252

16. Dichev, D., Zhelezarov, I., Anastasov, K., Dicheva, K., Kupriyanov, O., Malakov, I., Nikolova, H., Ormanova, M., Petrov, N.

    Increasing the Accuracy of Making Threaded Gauges Based on Statistical Methods

    2023 XXXIII International Scientific Symposium Metrology and Metrology Assurance (MMA), IEEE, 2023. https://ieeexplore.ieee.org/document/10317905

17. Dichev, D., Zhelezarov. I., Diakov, D., Dicheva, R., Kupriyanov, O., Malakov, I., Anastasov, K., Valkov, S., Petrov, N.

    Mathematical Model for Increasing Accuracy when Measuring Linear Quantities in Conditions of External Mechanical Impacts

    2023 XXXIII International Scientific Symposium Metrology and Metrology Assurance (MMA), IEEE, 2023. https://ieeexplore.ieee.org/document/10317908

18. Lovchinov K., Alexsieva G., Petrov M., Gergova R., Tyutyundziev N., Lazarova K., Babeva T.

    Influence of deposition temperature and time on structural and gas sensing properties of electrochemically deposited ZrO2 layers

    Materials Science and Engineering: B 297, 2023, 116793. https://www.sciencedirect.com/science/article/pii/S0921510723005354

19. Parshorov, S., Valkov, S., Ormanova, M., Gurov, S., Parshorov, I.

    Dynamic Relaxation Spectra in Berillium Bronze

    International Journal "NDT Days", 6, 4, 2023, 190-193. https://www.bg-s-ndt.org/journal/vol6/JNDTD-v6-n4-a02.pdf

20. Parshorov, S., Valkov, S., Ormanova, M., Gurov, S., Parshorov, I.

    Dynamic Relaxation Spectra in High Damping Mn-Cu Alloys

    International Journal "NDT Days", 6, 3, 2023, 131-136. https://www.bg-s-ndt.org/journal/vol6/JNDTD-v6-n3-a02.pdf

21. Parshorov, S., Valkov, S., Ormanova, M., Gurov, S., Parshorov, I.

    On the nature of the resonance relaxation maximum in high damping alloys.

    Engineering Sciences, 2, 2023, 11-19.

22. Petrov N, Tsvetkov Ts, Tyutyundzhiev N, Semkov ?, Mishev ?, Shirov G, Zinkova Y, Mutafov A, Nichev H, Petrov M, Angelov H, Arsov T, Serafimov N, Georgiev G.

    New Research Project: Ground-Based Monitoring of Cosmic Particles and Space Weather

    Proceedings of the Fifteenth Workshop "Solar Influences on the Magnetosphere, Ionosphere and Atmosphere" June 2023, 120-124. ISSN: 2367-7570. https://spaceclimate.bas.bg/ws-sozopol/pdf/Proceedings2023.pdf

23. Недева Д., Падикова Ф., Котларски Г.,

    Методи за обработка на материали базирани на интензивни енергийни потоци

    Proceedings of Unitech 2023, 2, 2023, 333-338.

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2022

1. Kaisheva, D., Kotlarski, G., Stoyanov, B., Dunchev, V., Ormanova, M., Valkov, S.

   Electron beam welding of dissimilar metals and alloys

   Proceedings of Unitech 2022, 2, 2022, 367-372 https://unitech2022.tugab.bg/images/c2022/che/p69.pdf

2. Kaisheva, D., Anchev, A., Valkov, S., Dunchev, V., Kotlarski, G., Stoyanov, B., Ormanova, M., Atanasova, M., Petrov, P.

   Influence of Beam Power on Structures and Mechanical Characteristics of Electron-Beam-Welded Joints of Copper and Stainless Steel

   Metals, 12 (5), MDPI, 2022, 737. https://www.mdpi.com/2075-4701/12/5/737

3. Kaisheva, D., Anchev, A., Dunchev, V., Kotlarski, G., Stoyanov, B., Ormanova, M., Valkov, S.

   Electron-Beam Welding Cu and Al6082T6 Aluminum Alloys with Circular Beam Oscillations

   Crystals, 12, 12, MDPI, 2022, 1757. JCR-IF (Web of Science):2.67 Q2 (Web of Science) https://www.mdpi.com/2073-4352/12/12/1757

4. Kaisheva, D., Anchev, A., Dunchev, V., Stoyanov, B., Valkov, S., Ormanova, M., Kotlarski, G., Todorov, V., Atanasova, M., Petrov, P.

   Welding of copper and 304L stainless steel with continuous electron beam

   Bulgarian Chemical Communications, 54, Special Issue B2, 2022, ISSN:0324-1130, 78-81.

5. Kaisheva, D., Anchev, A., Dunchev, V., Stoyanov, B., Valkov, S., Ormanova, M., Kotlarski, G., Todorov, V., Atanasova, M., Rabadzhiyska, S., Petrov, P.

   Study of the structure and mechanical properties of electron-beam-welded dissimilar joints of copper and stainless steel with and without offset

   Journal of Physics: Conference Series, 2240, 2022, 012006.
   https://iopscience.iop.org/article/10.1088/1742-6596/2240/1/012006

6. Kotlarski, G., Ormanova, M., Ossenbrink, R., Nikitin, A., Doynov, N., Valkov, S., Michailov, V.

   Fabrication and Characterization of Wire Arc Additively Manufactured AlSi5 Structures

   Metals, 12, MDPI, 2022, DOI:10.3390/met12111870, 1870. https://www.mdpi.com/2075-4701/12/11/1870/htm

7. Ormanova, M., Dechev, D., Ivanov, N., Mihai, G., Gospodinov, M., Valkov, S., Enachescu, M.

   Synthesis and Characterization of Ti-Ta-Shape Memory Surface Alloys Formed by the Electron-Beam Additive Technique

   Coatings, 12, 5, MDPI, 2022, 678. https://www.mdpi.com/2079-6412/12/5/678

8. Ormanova, M., Kotlarski, G., Valkov, S., Dechev, D., Ivanov, N., Petrov, P.

   Formation and characterization of CuO coatings deposited by reactive magnetron sputtering

   Journal of Physics: Conference Series, 2240, 2022, 012010.
   https://iopscience.iop.org/article/10.1088/1742-6596/2240/1/012010

9. Ormanova, M., Kotlarski, G., Bezdushnyi, R., Ivanov, N., Dechev, D., Valkov, S.

   Structure of Ti-Ta alloys fabricated by electron-beam surface alloying

   Comptes rendus de l'Acad?mie bulgare des, 75, 9, 2022, ISSN:2367-5535, DOI:https://doi.org/10.7546/CRABS.2022.09.04, 1279-1286.
   https://proceedings.bas.bg/index.php/cr/article/view/168

10. Rabadzhiyska, S., Kotlarski, G., Valkov, S., Ormanova, M., Shipochka, M., Petrov, P.

    Electron-beam physical vapor deposition of diamond-like carbon coatings on Si substrates

    AIP Conference Proceedings, 2449, 2022, ISSN:1551-7616, 060009. https://aip.scitation.org/doi/abs/10.1063/5.0094838

11. Rabadzhiyska, S., Kotlarski, G., Valkov, S., Ormanova, M., Shipochka, M., Rafailov, P., Petrov, P.

    Characterization of Diamond-like carbon films produced by electron- beam physical vapor deposition

    Materials Today: Proceedings, 2022, ISSN:2214-7853,
    https://www.sciencedirect.com/science/article/pii/S2214785322055663?via%3Dihub

12. Rabadzhiyska, S., Kotlarski, G., Shipochka, M., Rafailov, P., Ormanova, M., Strijkova, V., Dimcheva, N., Valkov, S.

    Duplex Surface Modification of 304-L SS Substrates by an Electron-Beam Treatment and Subsequent Deposition of Diamond-like Carbon Coatings

    Coatings, 12, MDPI, 2022, 401. https://www.mdpi.com/2079-6412/12/3/401

13. Rabadzhiyska, S., Ormanova, M., Valkov, S., Dechev, D., Terziyska, P., Petrov, P.

    Study of the structure, roughness and optical properties of HfO₂ coatings deposited on microscopic glass substrates

    Journal of Physics: Conference Series, 2240, 2022, 012011.
    https://iopscience.iop.org/article/10.1088/1742-6596/2240/1/012011

14. Valkov, S., Ormanova, M., Ivanov, N., Dechev, D., Bezdushnyi, R., Petrov, P.

    Duplex surface modification of tool steel - deposition of a WN film and subsequent electron-beam modification

    Journal of Physics: Conference Series, 2240, 2022, 012043.
    https://iopscience.iop.org/article/10.1088/1742-6596/2240/1/012043

15. Alexsieva, G, Lovchinov, K, Petrov,M, Gergova, R, Tyutyundzhiev, N.

    Influence of Al Doping on the Morphological, Structural and Gas Sensing Properties of Electrochemically Deposited ZnO Films on Quartz Resonators.

    12, 1, MDPI, 2022, ISSN:20796412, DOI:10.3390/coatings12010081,

16. Fabien Kunis, Konstantin Ilchev, Milena Stoyanova, Vesela Dimova, Tsanislava Genova, Stefan Valkov, Christina Andreeva

    Improving the students' learning of optics and atomic and molecular physics by computer-assisted school experiments

    Proceedings of the International Scientific Conference UniTech 2022, UNIVERSITY PUBLISHING HOUSE "V. APRILOV" - GABROVO, 2022, ISSN:1313-230X, 256-260 Национално академично издателство
    https://unitech2022.tugab.bg/images/c2022/edu/p71.pdf

17. Ivalina Avramova, Dimitar Dimov, Nadya Stankova, Miroslav Petrov, Desislava Karaivanova, Georgi Avdeev, Stoyan Russev, Daniela Karashanova, Bilyana Georgieva, Evgeniya Valcheva, Teodor Milenov

    Novel approach for synthesis of graphene-like phases by pulsed laser ablation in a flow mode suspension

    Materials, 15, 22, MDPI, 2022, DOI:https://doi.org/10.3390/ma15227870, 7870-1-7870-14,
    https://www.mdpi.com/1996-1944/15/22/7870

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2021

1. Valkov, S., Dechev, D., Ivanov, N, Bezdushnyi, R., Ormanova, M., Petrov, P.

   Influence of Beam Power on Young's Modulus and Friction Coefficient of Ti-Ta Alloys Formed by Electron-Beam Surface Alloying

   Metals, 11, 8, 2021, DOI:doi.org/10.3390/met11081246, 1246. JCR-IF (Web of Science):2.351
   https://www.mdpi.com/2075-4701/11/8/1246

2. Kaisheva, D., Bokuchava, G., Papushkin, I., Valkov, S., Ormanova, M., Petrov, P.

   COMPARATIVE NEUTRON DIFFRACTION STUDY OF RESIDUAL STRESSES, ARISING AFTER ELECTRON BEAM WELDING OF VARIOUS STEELS

   Journal of the Technical University of Gabrovo, 63, 2021, 72-75
   http://izvestia.tugab.bg/index.php?m=20&tom=21

3. Nikolova, M., Ormanova, M., Nikolova, V., Apostolova, M.

   Electrochemical, Tribological and Biocompatible Performance of Electron Beam Modified and Coated Ti6Al4V Alloy

   International Journal of Molecular Sciences, 22, 12, 2021, 6369. JCR-IF (Web of Science):4.556
   https://www.mdpi.com/1422-0067/22/12/6369

4. Ormanova, M., Kotlarski, G., Dechev, D., Valkov, S., Ivanov, N., Petrov, P.

   CRYSTALLOGRAPHY OF COOPER OXIDE COATINGS DEPOSITED ON SI SUBSTRATE BY REACTIVE MAGNETRON SPUTTERING

   Journal of the Technical University of Gabrovo, 63, 2021, 81-83
   http://izvestia.tugab.bg/index.php?m=20&tom=21

5. Valkov, S., Kotlarski, G., Ormanova, M., Doynov, N., Ossenbring, R., Petrov, P., Michailov, V.

   Crystallography and Mechanical Properties of Wire Arc Additively Manufactured Al5356 Components

   Comptes rendus de l'Acad?emie bulgare des Sciences, 74, 6, 2021, DOI:DOI: 10.7546/CRABS.2021.06.03, 820-827.
   http://www.proceedings.bas.bg/index.php/cr

6. Lovchinov, K, Alexieva, G, Georgieva, B, Petrov, M, Gergova, R, Tzoukrovsky, Y, Tyutyundzhiev, N.

   "Study of the sensitivity of ZrO and ZnO layers electrochemically deposited on a quartz resonator",

   IOP Conf. Series: Journal of Physics: Conf. Series, 1762, Journal of Physics: Conf. Series, 2021, DOI:https://doi.org/10.1088/1742-6596/1762/1/012033, 012033.
   https://iopscience.iop.org/article/10.1088/1742-6596/1762/1/012033

7. Tyutyundzhiev, N., Angelov, Ch., Arsov, T, Lovchinov, K., Nitchev, Hr., Alexieva, G.

   Development of Cost-efficient Wireless Network for Solar UV Irradiation Monitoring in Bulgaria

   Journal of Physics: Conference Series, 1762, 012040, 2021, ISSN:1742-6596, DOI:DOI:doi:10.1088/1742-6596/1762/1/012040, 1-8.
   https://iopscience.iop.org/journal/1742-6596

8. Kotlarski, G., Valkov, S., Andreeva, A., Mateev, I., Marinova, I., Petrov, P.

   Electrical contact resistance of tungsten coatings deposited on Cu and Al conductors

   Journal of Physics: Conference Series, 1859, 2021, 012063.

9. Ormanova, M., Valkov S., Petrov, P.

   Influence of the electron beam parameters on the structure and properties of electron beam surface treated Ti₆Al₄V alloy

   Proceedings of 6^th International Electron Beam Welding Conference, 2021, ISBN:978-3-96144-133-4, 46-49.

10. Rabadzhiyska, S., Ormanova, M., Valkov, S., Ivanov, N., Terziyska, P., Ivanov, K., Petrov, P.

    Study optical properties of the thin HfO₂ coatings deposited by DC reactive magnetron sputtering

    Journal of Physics: Conference Series, 1859, 2021, 012066.

11. Valkov, S., Ormanova, M., Bezdushnyi, R., Petrov, P.

    Electron-beam surface alloying of Ti substrates with Ta films

    IOP Conference Series: Materials Science and Engineering, 1056, 2021, DOI:doi:10.1088/1757-899X/1056/1/012006, 012006.

12. Valkov, S., Petrov, P.

    Improvement of the surface properties of light metals by electron beam additive technique

    Proceedings of 6^th International Electron Beam Welding Conference, 2021, ISBN:978-3-96144-133-4, 40-45.

13. Valkov, S., Parshorov, S., Andreeva, A., Rabadzhiyska, S., Nikolova, M., Bezdushnyi, R., Petrov, P.

    Influence of beam power on the surface architecture and corrosion behavior of electron-beam treated Co-Cr-Mo alloys

    Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 494-495, 2021, DOI:https://doi.org/10.1016/j.nimb.2021.03.007, 46-52.

14. Donkov, N., Zykova, A., Safonov, V., Dudin, S., Yakovin, S., Petrov, P., Rabadzhiyska, S.

    Structural and mechanical properties of Ta-based coatings deposited on polymers for biomedical applications

    IOP Conference Series: Materials Science and Engineering, 1056, 2021, DOI:doi:10.1088/1757-899X/1056/1/012011, 012011.

15. Valkov, S., Parshorov, S., Andreeva, A., Nikolova, M., Petrov, P.

    Surface modification of Co-Cr-Mo alloys by electron-beam treatment

    IOP Conference Series: Materials Science and Engineering, 1056, 2021, DOI:doi:10.1088/1757-899X/1056/1/012008, 012008.

16. Petrov, M., Lovchinov, K., Slavov, L., Hikov, T., Tyutyundzhiev, N.

    Electrochemically-stabilized carbon materials for supercapacitor prototypes

    Journal of Physics: Conference Series, 1859, IOP Publishing Ltd., 2021, ISSN:1742-6588, DOI:doi:10.1088/1742-6596/1859/1/012065, 012065.

17. Petrov, M., Lovchinov, K., Slavov, L., Stankulov, T., Nitchev, H., Hikov, T., Tyutyundzhiev, N.

    Thermally Stabilized Soot for Supercapacitors

    Physica status solidi (a), WILEY-V C H VERLAG GMBH, 2021, ISSN:1862-6300, DOI:https://doi.org/10.1002/pssa.202000617, 2000617.

18. Nikolova, M., Ormanova, M., Tonev, D., Petrov, P.

    Roughness and mechanical properties of electron-beam surface modified and TiN/TiO₂-coated Ti₆Al₄V alloy

    IOP Conference Series: Materials Science and Engineering, 1056, 2021, DOI:doi:10.1088/1757-899X/1056/1/012007, 012007.

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2020

1. Petrov, M., Lovchinov, K., Valkov, S., Tyutyundzhiev, N.

   Soot as electrode coating for supercapacitor prototypes

   Journal of Physics: Conference Series, 1492, 2020, 012043. SJR (Scopus):0.23

2. Valkov, S., Ormanova, M., Petrov, P.

   Electron-Beam Surface Treatment of Metals and Alloys: Techniques and Trends

   Metals, 10, 9, 2020,
   DOI:https://doi.org/10.3390/met10091219, 1219.
   JCR-IF (Web of Science):2.117

3. Parshorov, S., Valkov, S., Petrov. P.

   Martensitic transformations in Fe-Mn alloy with low stacking fault energy

   IOP Conf. Series: Materials Science and Engineering, 878, 2020,
   DOI:doi:10.1088/1757-899X/878/1/012052, 012052. SJR (Scopus):0.2

4. Tongov, M., Hikov, T., Angelov, I., Petrov, P.

   Measuring the diameter of electron beam by rotating slit disc

   IOP Conf. Series: Materials Science and Engineering, 878, 2020,
   DOI:doi:10.1088/1757-899X/878/1/012053, 012053. SJR (Scopus):0.2

5. Anestiev, L., Lazarova, R., Petrov, P., Dyakova, V., Stanev, L.

   On the strengthening and the strength reducing mechanisms at aluminium matrix composites reinforced with nano-sized TiCN particulates

   Journal Philosophical Magazine Part A: Materials Science, 2020,
   DOI:http://doi.org/10.1080/14786435.2020.1821114, JCR-IF (Web of Science):1.778

6. Hikov, T., Nikolova, M., Petrov, P.

   Effect of TiN/TiO₂ multilayer coatings on the properties of stainless steel for biomedical applications

   Journal of Physics: Conference Series, 1, 1492, 2020, 012029.

7. Kaisheva, D., Petrov, P., Bokuchava, G., Papushkin, I.

   Study of residual stresses in electron beam welded constructive steel via neutron diffraction method

   Bulgarian Chemical Communications, 52, Issue A, 2020, 129-133 .

8. N Tyutyundzhiev, Ch Angelov, K Lovchinov, Hr Nitchev, T Arsov, A Mutafov.

   Comparative measurements of solar UV irradiation at the high-mountain stations of BEO-Moussala (BG) and NAORozhen (BG)

   Journal of Physics: Conference Series, 1492, 2020,
   DOI:DOI:doi:10.1088/1742-6596/1492/1/012044, 1-6. SJR (Scopus):0.211

9. Kaisheva, D., Bokuchava, G., Papushkin, I., Petrov, P.

   NEUTRON DIFFRACTION MEASUREMENT OF RESIDUAL STRESSES IN ELECTRON BEAM WELDED LOW CARBON STEEL

   Comptes rendus de l'Académie bulgare des Sciences, 73, 4, 2020, DOI:DOI:10.7546/CRABS.2020.04.05, 475-484.

10. Ormanova, M., Nikolova, M., Angelov, V., Petrov, P.

    Investigation of the microstructure and the thermal processes in a Ti₆Al₄V alloy surface-modified by scanning electron beam

    Journal of Physics: Conference Series, 1, 1492, 2020, 012065.

11. Petrov, P., Tongov, M.

    Numerical modelling of heat source during electron beam welding

    Vacuum, 171, 108991, 2020, ISSN:0042-207X.

12. Petrov, P., Tongov, M.

    Study of the cathode emissivity in generators for electron beam systems

    Optik - International Journal for Light and Electron Optics, 209, 2020, 164358.

13. Rabadzhiyska, S., Ormanova, M., Ivanov, N., Petrov, P.

    Effect of the inert/reactive gases ratio and bias voltage on the tribological properties of VN coatings

    Journal of Physics: Conference Series, 1, 1492, 2020, 012062.

14. Valkov, S., Petrov, P.

    Formation and characterization of Al-Hf alloys by selective electron-beam surface alloying

    Journal of Physics: Conference Series, 1, 1492, 2020, 012042.

15. Bokuchava, G., Petrov, P.

    Study of Residual Stresses and Microstructural Changes in Charpy Test Specimens Reconstituted by Various Welding Techniques

    Metals, 10, 632, 2020, ISSN:2075-4701, DOI:doi:10.3390/met10050632.

16. Petrov, P., Tongov, M., Ormanova, M., Valkov, S.

    Study of the processes in the electrostatic part of the electron-beam generator

    Comptes rendus de l'Académie bulgare des Sciences, 73, 9, 2020, ISSN:1310-1331,
    DOI:DOI:10.7546/CRABS.2020.09.05, 1225-1228. JCR-IF (Web of Science):0.343 Q2

17. Kolev, M., Valkov, S., Lazarova, R., Petrov, P., Dimitrova, R., Dyakova, V.

    Tribological properties of aluminium reinforced by TiCN nanosized powder

    Journal of Physics: Conference Series, 1, 1492, 2020, 012066.

18. Lazarova, R., Valkov, S., Dyakova, V., Petrov, P.

    Layers obtained on TiCN aluminum nanocomposites by electron-beam treatment

    IOP Conference Series: Materials Science and Engineering, 1, 733, 2020, 012017.

19. Lovchinov K., Marinov G, Petrov M, Tyutyundzhiev N, Alexieva G, Babeva T.

    Influence of deposition temperature on the structural and optical properties of electrochemically nanostructured ZnO films

    Comptes rendus de l'Académie bulgare des Sciences, 73, 2, BAS, 2020, SJR (Scopus):0.218 Q2

20. Lovchinov, K., Nitchev, H, Petrov, M., Stoykov, R., Tyutyundzhiev, N.

    Simulation and modelling of small solar thermal plant

    Measurement, 162, 2020, 107944.

21. Nikolova, M., Valkov, S., Yankov, E., Petrov, P.

    Composition, structure and adhesion of cathodic-arc and glow-discharge deposited TiN/TiO₂ coatings: A case study

    Journal of Physics: Conference Series, 1, 1492, 2020, 012037.

22. Nikolova, M., Nikolova, V., Ivanova, V., Valkov, S., Petrov, P., Apostolova, M.

    Mechanical properties and in vitro biocompatibility evaluation of TiN/TiO₂ coated Ti₆Al₄V alloy

    Materials Today: Proceedings, 2020,
    DOI:doi.org/10.1016/j.matpr.2020.05.051, SJR (Scopus):0.304

23. Parshorov, S., Petrov, P., Valkov, S.

    Investigation of the Micro-Structural Parameters of Iron Alloys

    International Journal "NDT Days", 3, 4, 2020, ISSN:2603-4018, 200-204

24. Parshorov, S., Machev, E., Petrov, P., Valkov, S.

    Martensitic Transformations in High Alloy Fe-Ni Alloys

    International Journal "NDT Days", 3, 4, 2020, ISSN:2603-4018, 191-195

25. Parshorov, S., Machev, E., Petrov, P., Valkov, S.

    Phase Composition and Microstructure of Fe-12% Mn and Fe-20% Ni Alloy after Hot Plastic Deformation

    International Journal "NDT Days", 3, 4, 2020, ISSN:2603-4018, 196-199

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2019

1. Hikov, T., Krasteva, N., Hristova-Panusheva, K., Ivanov, N., Petrov, P.

   Study on the biocompatibility of TiN/TiO₂ bilayer coatings deposited by DC magnetron sputtering on stainless steel

   AIP Conference Proceedings, 2075, 2019, DOI:https://doi.org/10.1063/1.5091349, 160022. SJR (Scopus):0.165

2. Kaisheva, D., Angelov, V., Petrov, P.

   Simulation of heat transfer at welding with oscillating electron beam

   Canadian Journal of Physics, 97, 10, 2019, DOI:https://doi.org/10.1139/cjp-2018-0495, 1140-1146. ISI IF:1.016

3. Kaisheva, D., Bokuchava, G., Papushkin, I., Genchev, G., Doynov, N., Ossenbrink, R., Michailov, V., Petrov, P.

   Determination of residual stresses in fiber laser welded stainless steel joints by neutron diffraction method

   Proceedings of SPIE - The International Society for Optical Engineering, 11047, 110470H, 2019, ISBN:978-151062768-0, ISSN:0277786X, DOI:10.1117/12.2516421, SJR:0.234

4. Kaisheva, D., Papushkin, I., Bokuchava, G., Petrov, P.

   Study of residual stresses in electron beam welded samples of an aluminum alloy via neutron diffraction method

   AIP Conference Proceedings, 2075, 2019, DOI:10.1036/1.5091340, 160013-1-160013-5. SJR (Scopus):0.165

5. Tyutyundzhiev, N., Petrov, M., Lovchinov, K., Nichev, H., Angelov, H., Petrov, P.

   Development of low-cost technology to obtain carbon based supercapacitors

   Journal of Physics: Conference Series, 1186, 2019, 012033. SJR (Scopus):0.24

6. Valkov, S., Bezdushnyi, R., Lazarova, R., Dimitrova, R., Petrov, P.

   Surface modification of Al substrate with TiCN nanopowder by electron-beam treatment

   AIP Conference Proceedings, 2075, 2019, DOI:https://doi.org/10.1063/1.5091344, 160017. SJR(Scopus):0.165

7. Valkov, S., Parshorov, S., Andreeva, A., Bezdushnyi, R., Nikolova, M., Dechev, D., Ivanov, N., Petrov, P.

   Influence of Electron Beam Treatment of Co-Cr Alloy on the Growing Mechanism, Surface Topography, and Mechanical Properties of Deposited TiN/TiO₂ Coatings

   Coatings, 9, 513, 2019, DOI:doi:10.3390/coatings9080513, JCR-IF (Web of Science):2.33

8. Angelov, V., Ormanova, M., Kaisheva. D., Lazarova, R., Dimitrova, R., Petrov, P.

   Selective electron beam surface alloying of aluminum with TiCN nanoparticles

   Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 440, 2019, ISSN:0168-583X, DOI:https://doi.org/10.1016/j.nimb.2018.12.007, 88-94. SJR:0.558, ISI IF:1.323

9. Nikolova, M., Valkov, S., Iosub, R., Yankov, E., Petrov, P.

   Electrochemical impedance spectroscopy of complex titanium nitride coating with thin surface oxide film deposited on pure titanium

   Romanian Journal of Materials, 49, 1, 2019, 42-50. JCR-IF (Web of Science):0.661

10. Nikolova, M., Valkov, S., Parshorov, S., Yankov, E., Petrov, P.

    Biomineralization of Titanium Alloy with Surface Micro- and Nanoscaled Modifications

    Key Engineering Materials, 813, 2019, DOI:10.4028/www.scientific.net/KEM.813.165, 165-170. SJR (Scopus):0.18

11. Nikolova, M., Nikolov, V., Valkov, S., Yankov, E., Zaharieva, V., Petrov, P.

    Ethylene Oxide Sterilization of TiN/TiO₂ Coated Titanium Implant Material

    Key Engineering Materials, 813, 2019, DOI:10.4028/www.scientific.net/KEM.813.165, 178-184. SJR (Scopus):0.18

12. Parshorov, S., Petrov, P., Valkov, S., Lazarova, R., Dimitrova, R.

    Kinetics of deformation martensite formation in TRIP/transformation induced plasticity/steels

    AIP Conference Proceedings, 2075, 2019, DOI:https://doi.org/10.1063/1.5091354, 160027. SJR (Scopus):0.165

13. Parshorov, S., Petrov, P., Valkov, S.

    Non isothermal martensite transformations in TRIP/transformation induced plasticity/steels

    AIP Conference Proceedings, 2075, 2019, DOI:https://doi.org/10.1063/1.5091353, 160026. SJR:0.165

Top

    

2018

1. Petrov, P., Dechev, D., Ivanov, N., Hikov, T., Valkov, S., Nikolova, M.P., Yankov, E., Parshorov, S., Bezdushnyi, R., Andreeva, A.

   Study of the influence of electron beam treatment of Ti₅Al₄V substrate on the mechanical properties and surface topography of multilayer TiN/TiO₂ coatings

   Vacuum, 154, 2018, ISSN:0042-207X, DOI:https://doi.org/10.1016/j.vacuum.2018.05.026, 264-271. ISI IF:2.067

2. Petrov, P., Kaisheva. D., Bokuchava, G., Papushkin, I.

   Study of residual stresses during electron beam welding of alloyed steels using neutron diffraction

   Bulgarian Chemical Communication, 50, Special Issue B, 2018, ISSN:0324-1130, 85-90. ISI IF:0.238

3. Valkov, S., Ormanova, M., Petrov, P.

   Surface Manufacturing of Materials by High Energy Fluxes

   Advanced Surface Engineering Research, IntechOpen, 2018, ISBN:978-1-78984-340-8, DOI:DOI: 10.5772/intechopen.79874, 19, 69-87

4. Valkov, S., Bezdushnyi, R., Petrov, P.

   Study of the influence of vanadium and niobium on the microstructure and crystallographic structure of Ti-Al-V and Ti-Al-Nb alloys formed by selective electron beam alloying

   Journal of Physics: Conference Series, 992, 012053, 2018, DOI:doi :10.1088/1742-6596/992/1/012053, SJR:0.24

5. Valkov, S., Bezdushnyi, R., Petrov, P.

   Synthesis, structure and mechanical properties of Ti-Al-Nb coatings formed by electron beam additive technique

   Vacuum, 156, 2018, ISSN:0042-207X, DOI:https://doi.org/10.1016/j.vacuum.2018.07.021, 140-145. ISI IF:2.067

6. Valkov, S., Neov, D., Bezdushnyi, R., Beskrovnyi, A., Kozlenko, D., Petrov, P.

   Study of the micro-structure, crystallographic structure and thermal stability of Al-Ti-Nb alloys produced by selective electron beam alloying

   Journal of Surface Investigation, X-ray, Synchrotron and Neutron Techniques, 12, 3, 2018, ISSN:1027-4510, DOI:https://doi.org/10.1134/S1027451018030187, 436-441. ISI IF:0.359

7. Valkov, S., Nikolova, M., Yankov, E., Hikov, T., Bezdushnyi, R., Dechev, D., Ivanov, N., Petrov, P.

   Comparison of the Phase Composition and Nanohardness of Gradient TiN/TiO₂ Coatings on Ti₅Al₄V Alloy Deposited by Different PVD Methods

   IOP Conf. Series: Materials Science and Engineering, 416, 2018, 012034. SJR:0.201

8. Bokuchava, G., Petrov, P., Genchev, G., Michailov, V., Doynov, N., Ossenbrink, R.

   Residual Stress Analysis in Welded Joints by Neutron Diffraction and Computer Modeling

   Romanian Journal of Physics, 63, 7-8, 2018, ISSN:1221-146X, 904-921. ISI IF:1.433

9. Kolev, M., Dimitrova, R., Parshorov, S., Valkov, S., Lazarova, R., Petrov, P.

   Surface modification of an aluminum alloy by electron beam introducing TiCN nanoparticles

   Journal of Physics: Conference Series, 992, 012042, 2018, DOI:https://doi.org/10.1088/1742-6596/992/1/012042, SJR:0.24

10. Lazarova, R., Dimitrova, R., Murdjeva, Y., Valkov, S., Petrov, P.

    Layers obtained on aluminum by nanopowder deposition and subsequent electron beam scanning

    Materials and Manufacturing Processes, 33, 10, 2018, ISSN:1532-2475, DOI:https://doi.org/10.1080/10426914.2018.1453148, 1128-1132. ISI IF:2.669

11. Nikolova, M., Yankov, E., Hikov, T., Dechev, D., Ivanov, N., Parshorov, S., Zaharieva, V., Petrov, P.

    Comparison of the Corrosion Behaviour of Differently Deposited PVD TiN/TiO₂ Coatings on Electron Beam Modified Ti₅Al₄V Alloy

    IOP Conf. Series: Materials Science and Engineering, 416, 2018, ISSN:1757-899X, 012058. SJR:0.201

12. Nikolova, M., Yankov, E., Nikolov, D., Tonev, D., Zaharieva, V., Ormanova, M., Valkov, S., Hikov, T., Petrov, P.

    Influence of the Chemical Composition, Structure and Heat Treatment on the Topography and Mechanical Properties of Ti₅Al₄V and Ti₆Al₄V after Electron Beam Surface Treatment

    IOP Conf. Series: Materials Science and Engineering, 416, 2018, ISSN:1757-899X, 012031. SJR:0.201

13. Nikolova, M.P., Genov, A., Valkov, S., Yankov, E., Dechev, D., Ivanov, N., Bezdushnyi, R., Petrov, P.

    Application of TiN/TiO₂ coatings on stainless steel: composition and mechanical reliability

    Journal of Physics: Conference Series, 992, 012032, 2018, DOI:https://doi.org/10.1088/1742-6596/992/1/012032, SJR:0.24

14. Nikolova, M.P., Yankov, E., Petrov, P., Valkov, S., Ormanova, M., Zaharieva, V., Tonev, D., Andreeva, A.

    Electron beam surface modification of Ti₅Al₄V alloy for biomedical applications

    Proceedings of METAL 2017 - 26th International Conference on Metallurgy and Materials, 2018, ISBN:978-80-87294-79-6, 1555-1560

15. Nikolova, M.P., Yankov, E., Petrov, P., Nikolov, D., Valkov, S., Zaharieva, V., Ormanova, M.

    Phase and mechanical changes of Ti₅AL₄V alloy after heat treatment in vacuum

    Proceedings of METAL 2017 - 26th International Conference on Metallurgy and Materials, 2018, ISBN:978-80-87294-79-6, 1899-1904

16. Papushkin, I., Kaisheva. D., Bokuchava, G., Angelov, V., Petrov, P.

    Study of residual stresses in CT test specimens welded by electron beam

    Journal of Physics: Conference Series, 992, 012016, 2018, DOI:https://doi.org/10.1088/1742-6596/992/1/012016, SJR:0.24

17. Yankov, E., Nikolova, M., Dechev, D., Ivanov. N., Hikov, T., Valkov, S., Dimitrova, V., Yordanov, M., Petrov, P.

    Changes in the Mechanical Properties of Ti Samples with ТiN and TiN/TiO₂ Coatings Deposited by Different PVD Methods

    IOP Conf. Series: Materials Science and Engineering, 416, 2018, ISSN:1757-899X, 012062. SJR:0.201

18. Yankov, E., Nikolova, M.P., Petrov, P., Zaharieva, V., Valkov, S., Ormanova, M.

    Influence of the combined vacuum heat treatment and electron beam surface modification on the elastic-plastic behavior of Ti₅Al₄V alloy

    Proceedings of METAL 2017 - 26th International Conference on Metallurgy and Materials, 2018, ISBN:978-80-87294-79-6, 1549-1554

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2017

1. Ormanova, M., Petrov, P., Kovacheva, D.

   Electron beam surface treatment of tool steels

   Vacuum, 135, 2017, ISSN:0042-207X, DOI:http://dx.doi.org/10.1016/j.vacuum.2016.10.022, 7-12. SJR:0.572, ISI IF:1.558

2. Ormanova, M, Dechev, D., Bezdushnyi, R., Petrov, P.

   Phase composition of multilayer system TiN/CrN deposited by DC magnetron sputtering

   Bulgarian Chemical Communication, 49, special issue A, 2017, ISSN:0324-1130, 98-102. ISI IF:0.229

3. Petrov, P., Bokuchava, G., Papushkin, I., Genchev, G., Michailov, V., Ormanova, M.

   Neutron diffraction studies of laser welding residual stresses

   Proceedings of SPIE, 10226, 2017, DOI:doi: 10.1117/12.2261802, SJR:0.37

4. Valkov, S., Petrov, P., Dechev, D., Ivanov, N., Bezdushnyi, R.

   Study formation of aluminides in Al-Ti-X (X = Zr, Hf) systems induced by electron-beam surface treatment

   Proceedings of 4th International Electron Beam Welding Conference, 2017, 16-20

5. Valkov, S., Petrov, P., Lazarova, R.

   Comparative study of electron and laser beam surface alloying

   Proceedings of SPIE, 10226, 2017, DOI:10.1117/12.2262352, SJR:0.37

6. Bodnarchuk, V. I, Petrov, P., Kozlenko, D. P., Dechev, D., Ivanov, N., Martev, I., Kasatkin, I. A.

   Study into the properties of Ti|N/WN multilayer nanocoatings prepared via magnetron sputtering

   Springer, 11, 1, Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques, 2017, ISSN:1027-4510, DOI:10.1134/S1027451017010244, 186-189. ISI IF:0.36

7. Genchev, G., Doynov, N., Ossenbrink, R., Michailov, V., Bokuchava, G., Petrov, P.

   Residual stresses formation in multi-pass weldment: A numerical and experimental study

   Journal of Constructional Steel Research, 138, 2017, ISSN:0143-974X, DOI:https://doi.org/10.1016/j.jcsr.2017.08.017, 633-641. ISI IF:2.028

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