| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Post Weld Heat Treatment For Enhancing Mechanical Properties of Ti-6Al-4V |
| Author(s) |
Seongji Seo, Kyung Il Kim, Jeongho Han, Jiyong Park |
| On-Site Speaker (Planned) |
Seongji Seo |
| Abstract Scope |
Welding enhances production efficiency in aerospace manufacturing. However, localized heat during the welding process affects the microstructure and mechanical properties, necessitating careful consideration to ensure fracture resistance under external impacts and repeated loads. Therefore, this study aimed to address the issue of reduced mechanical properties of weldment through post weld heat treatment (PWHT). For this purpose, Ti-6Al-4V alloy (Ti64), one of the representative metals used in aircraft, was welded and heat treated at various temperatures below and above the β-transus temperature. Microstructure analysis for each location, along with tensile, impact toughness, and fatigue tests were conducted. As a result, the mechanical properties of PWHTed Ti64 are higher than those of as-welded sample, as the gradient of microstructure is gradually resolved. Specifically, PWHTed Ti64 was found to increase the number of fatigue cycles by more than 50 % compared to the as-welded one. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Phase Transformations, Mechanical Properties |