PSI - Issue 59

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 59 (2024) 399–406

© 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2023 Organizers © 2024 The Authors. Published b y ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2023 Organizers As a result of the comprehensive research, a fundamental technology for repairing CuZn37 brass products using TIG welding with CuSn4Zn3 filler wire was developed. This approach ensures high-quality defect-free weld joints, dense welds with satisfactory mechanical properties, and a minimal zone of softening. © 2024 The Authors. Published b y ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2023 Organizers VII International Conference “In -service Damage of Materials: Diagnostics and Prediction ” (DMDP 2023) Development of a fundamental technology for repairing products made of CuZn37 brass through TIG welding T. Maydanchuk a, *, Y. Lukianchenko a , S. Kozulin a , V. Porohonko a , S. Marynenko b a E.О. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine , 11 Kazimir Malevich Str., Kyiv 03150, Ukraine b Ternopil Ivan Puluj National Technical University, 56 Ruska Str., Ternopil 46001, Ukraine Abstract Comprehensive research was conducted to assess the feasibility of repairing CuZn37 brass products using the Tungsten Inert Gas (TIG) welding process. Standard welding wires designed for copper and its alloys (4 wire grades) were used as filler materials. The research on the macro- and microstructure of the weld joints revealed that the recrystallization region did not exceed 2 mm. The single- phase α -solid solution structure was characteristic of the welds made with CuSn4Zn3 filler wire. Microhardness measurements of the welds and the heat-affected zone showed significant softening up to 22-25 mm from the weld axis due to the thermal influence of the welding process on cold-rolled brass. As a result of the comprehensive research, a fundamental technology for repairing CuZn37 brass products using TIG welding with CuSn4Zn3 filler wire was developed. This approach ensures high-quality defect-free weld joints, dense welds with satisfactory mechanical properties, and a minimal zone of softening. VII International Conference “In -service Damage of Materials: Diagnostics and Prediction ” (DMDP 2023) Development of a fundamental technology for repairing products made of CuZn37 brass through TIG welding T. Maydanchuk a, *, Y. Lukianchenko a , S. Kozulin a , V. Porohonko a , S. Marynenko b a E.О. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine , 11 Kazimir Malevich Str., Kyiv 03150, Ukraine b Ternopil Ivan Puluj National Technical University, 56 Ruska Str., Ternopil 46001, Ukraine Abstract Comprehensive research was conducted to assess the feasibility of repairing CuZn37 brass products using the Tungsten Inert Gas (TIG) welding process. Standard welding wires designed for copper and its alloys (4 wire grades) were used as filler materials. The research on the macro- and microstructure of the weld joints revealed that the recrystallization region did not exceed 2 mm. The single- phase α -solid solution structure was characteristic of the welds made with CuSn4Zn3 filler wire. Microhardness measurements of the welds and the heat-affected zone showed significant softening up to 22-25 mm from the weld axis due to the thermal influence of the welding process on cold-rolled brass.

Keywords: CuZn37 brass; mechanical damage; TIG welding; physical-mechanical research. Keywords: CuZn37 brass; mechanical damage; TIG welding; physical-mechanical research.

* Corresponding author. Tel.: +38-096-194-34-33; fax: +38-044-205-23-98. E-mail address: pwi_37@ukr.net * Corresponding author. Tel.: +38-096-194-34-33; fax: +38-044-205-23-98. E-mail address: pwi_37@ukr.net

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2023 Organizers 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2023 Organizers

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2023 Organizers 10.1016/j.prostr.2024.04.057