| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Multiple Principal Component Materials
|
| Presentation Title |
Hydrogen Interaction With Stacking Faults in CoCrNiW Alloy:
Insights From In-Situ ECCI During Tensile Testing
|
| Author(s) |
Parth Khandelwal, Cemal Cem Tasan |
| On-Site Speaker (Planned) |
Parth Khandelwal |
| Abstract Scope |
Hydrogen interaction with microstructural defects is the key to understanding the hydrogen-induced premature failure in materials and identifying designing strategies to mitigate hydrogen embrittlement. This study explores the stacking fault development effects in hydrogen environment during deformation, utilizing the CoCrNiW alloy. Its deformation mechanism is unique as it primarily deforms through stacking faults. In-situ Electron Channeling Contrast Imaging (ECCI) and in-situ hydrogen charging in Scanning Electron Microscope were employed to investigate the interaction of stacking faults with hydrogen under no stress. Interestingly, stacking faults were not just observed moving while hydrogen charging but also exhibited changes in SF ribbon thickness, revealing the variation in stacking fault energy in the presence of hydrogen. Moreover, it was also found that hydrogen-induced damage (measured by fracture strain) was unaffected by the degree of pre-straining before hydrogen charging. This phenomenon was rigorously analyzed through post-mortem and in-situ experiments, to understand the underlying physical mechanisms. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, High-Entropy Alloys, |