| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Insights of Hydrogen Embrittlement for Austenitic Stainless Steels and Their Welds |
| Author(s) |
Namhyun Kang, Jimin Nam, Donghyun Choi, Sourav Kumar Saha, Byungrok Moon, Jaeseok Yoo, Seung-gun Lee |
| On-Site Speaker (Planned) |
Namhyun Kang |
| Abstract Scope |
Recently, hydrogen reaction on the metals has been tested using various charging methods: electrolytic and high-pressure gaseous purging. However, a study regarding to the hydrogen embrittlement (HE) of fcc welds needs a systematic study. This study used the all-weld metals and transverse weld joints. Electrolytic charging methods were optimized using various charging solutions, current density, and time for the welds and base metals. The fracture occurred in the weld metal (WM), not in the base metal (BM), and in particular, the HE at -100°C showed the poorest HE behavior rather than 25 and -196°C. Within the weld joint gauge, the amount of α' and ε-martensite transformation was smaller in WM than in BM, and in particular, the least amount of transformation was shown in 25°C. The HE behavior on the mechanical properties were investigated through the microstructural factors along with hydrogen diffusion and trap behaviour. |
| Proceedings Inclusion? |
Planned: |