| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
Unraveling Hydrogen Embrittlement of Model High Entropy Alloys |
| Author(s) |
Michela Geri, Menglei Jiang, Cemal Cem Tasan |
| On-Site Speaker (Planned) |
Michela Geri |
| Abstract Scope |
Hydrogen Embrittlement (HE) has been extensively studied in different metallic materials including high entropy alloys (HEAs); however, many fundamental questions remain open and need to be addressed to guide the design of alloys with improved resistance. Our group has recently developed a class of model FeMnCoCr systems that show double transformation (fcc to hcp to bct) and can be designed with variable stacking fault energy by carefully adjusting the Mn content. In this talk we investigate the possibility of using these metastable model HEAs that enable switching among dislocation-dominant, twinning-induced plasticity (TWIP) or transformation-induced plasticity (TRIP) modes, to systematically study the consequences on HE resistance. We do so by combining in-situ SEM characterization with hydrogen charging, imaging and mechanical testing at different length scales (from nanoindentation to tensile testing). Exploring these effects in a model system will help provide guidelines for HE-resistance in other TRIP- or TWIP-assisted alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Phase Transformations |