| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Corrosion and Environmental Degradation: Theory and Practice
|
| Presentation Title |
Effect of Welding Condition on Hydrogen Embrittlement in Weld Joint of 316L Stainless Steel |
| Author(s) |
Jimin Nam, Jaeseok Yoo, Changwook Ji, Seung-gun Lee, Namhyun Kang |
| On-Site Speaker (Planned) |
Jimin Nam |
| Abstract Scope |
Recent exacerbation of climate change has led to heightened interest in hydrogen energy. Tanks for storing liquid hydrogen necessitate excellent cryogenic properties and resistance to hydrogen embrittlement (HE). In this study, in order to develop a welding technology with excellent hydrogen embrittlement resistance, weld joints of stainless steel 316L were manufactured and hydrogen embrittlement behavior was evaluated. The welding technologies used were gas tungsten arc welding (GTAW) and laser beam welding (LBW). Regardless of welding method, both samples were most sensitive to HE at -100°C, with LBW showing superior cryogenic properties than GTAW. LBW and GTAW showed differences in chemical composition and delta ferrite, resulting in differences in destruction behavior due to hydrogen. HE according to welding method and temperature was investigated microstructurally along with hydrogen diffusion and trapping behavior. |