About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Steels in Extreme Conditions
|
| Presentation Title |
On the Cryogenic Embrittlement and its Mechanism of Austenitic High Mn Lightweight Steel |
| Author(s) |
Seon-Keun Oh, Young-Kyun Kim, Young-Sang Na |
| On-Site Speaker (Planned) |
Seon-Keun Oh |
| Abstract Scope |
Due to their representative advantages, such as excellent mechanical properties, superior economic efficiency compared to commercial stainless steels, and low density, austenitic high-manganese steels with high aluminum and carbon contents have been considered promising novel cryogenic materials. However, these steels sometimes showed unexpected embrittlement at small strain near the yield point according to the tensile temperature and aging condition. For example, whereas aging at 823 K for 40 min caused early fracture at the yield strain at 77 K, a similar embrittlement at low strain was observed at 4.2 K even in non-aged specimens. This study aims to investigate the effects of tensile temperature and aging condition on the embrittlement behavior of austenitic high Mn lightweight steel at cryogenic temperatures and to elucidate the underlying mechanism. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Environmental Effects, Mechanical Properties |