| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Steels in Extreme Environments
|
| Presentation Title |
Susceptibility to hydrogen embrittlement of 22Mn all-weld metals: effect of temperature on deformation behavior. |
| Author(s) |
Donghyeon Choi, Jimin Nam, Jaeseok Yoo, Namhyun Kang |
| On-Site Speaker (Planned) |
Donghyeon Choi |
| Abstract Scope |
Austenitic alloys are promising for liquid hydrogen storage tanks due to their low hydrogen diffusivity and high solubility. High manganese steels offer an economical alternative to austenitic stainless steels, but little research has focused on their welding. Evaluation is crucial because weld metal exhibits poorer properties due to thermal cycling and rapid cooling. This study assessed the hydrogen embrittlement susceptibility of 22Mn all-weld metal at various temperatures.
Specimens were electrochemically charged with hydrogen using 22Mn all weld metal manufactured by FCAW. To evaluate deformation behavior, slow strain rate tests (SSRT) were performed at 25°C, -100°C, and -196°C. Sensitivity to hydrogen embrittlement was highest at 25°C and decreased at lower temperatures. Cracking was influenced by temperature-dependent deformation mechanisms, particularly mechanical twinning, ε-martensite formation, and hydrogen diffusion rates. The results were analyzed considering microstructural factors along with hydrogen diffusion and trapping behavior. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Joining, Mechanical Properties |