| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Multiple Principal Component Materials
|
| Presentation Title |
B-2: Elemental Affinity Engineering for Improving Hydrogen Embrittlement in CoCrFeNiV High-entropy Alloys |
| Author(s) |
Sang Yoon Song, Gunjick Lee, Dae Cheol Yang, Min Young Sung, Yuri Hur, KenHee Ryou, Hyeon-Seok Do, Aparna Saksena, Baptiste Gault, Byeong-Joo Lee, Won-Seok Ko, Se-Ho Kim, Seok Su Sohn |
| On-Site Speaker (Planned) |
Sang Yoon Song |
| Abstract Scope |
Hydrogen embrittlement (HE) is a significant concern as it leads to reduction in the mechanical properties of metals and alloys. Previous research on HE has primarily focused on investigating microstructural factors and mitigating HE through microstructural modifications. However, there are limitations to improving HE solely through changes in microstructure, as it directly influences mechanical properties. To overcome these limitations, utilization of elements with hydrogen affinity, which can potentially alter hydrogen trap and diffusion behavior, offers promising approach. Nevertheless, studies addressing improvement of HE through hydrogen affinity have been lacking. In this study, two Fe-based high-entropy alloys were designed by selectively replacing V and Ni to have martensite matrix with 10% retained FCC. The V-added alloy having high hydrogen affinity exhibited significant enhancement in HE, accompanied by increase in hydrogen content and decrease in hydrogen diffusivity. The role of high-affinity V was confirmed based on the cryogenic atom probe tomography analysis. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Environmental Effects, Mechanical Properties |