About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
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Local Chemical Ordering and Its Impact on Mechanical Behaviors, Radiation Damage, and Corrosion
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| Presentation Title |
Influence of Chemical Short-Range Ordering on Hydrogen Interaction in CoCrNi |
| Author(s) |
Eric Marchezini Mazzer, Livia Cupertino Malheiros, Sangchu Quan, David Silva, Francisco Gil Coury |
| On-Site Speaker (Planned) |
Eric Marchezini Mazzer |
| Abstract Scope |
Hydrogen embrittlement is a critical issue for alloys exposed to hydrogen-rich environments. In this study, we investigate the influence of chemical short-range ordering (CSRO) on hydrogen uptake and its impact on mechanical properties in equiatomic CoCrNi alloys. Samples were heat treated to induce varying degrees of CSRO. Hydrogen interaction was assessed using thermal desorption spectroscopy (TDS), revealing that increased CSRO affects H trapping and reduce the diffusivity. Tensile testing under hydrogen-charged conditions showed that alloys with pronounced CSRO exhibited reduced embrittlement compared to more chemically disordered counterparts. These results indicate that CSRO not only alters the trapping landscape for hydrogen but also enhances resistance to H-induced mechanical degradation. Our findings underscore the role of local chemical order as a possible parameter in designing CoCrNi-based alloys for hydrogen-tolerant applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Entropy Alloys, Mechanical Properties |