| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| Presentation Title |
Welding-Driven Compositional Heterogeneity Enhances Cryogenic Mechanical Properties in Metastable Ferrous Medium-Entropy Alloy Welds |
| Author(s) |
Yoona Lee, Jeong Min Park, Nokeun Park, Hyoung Seop Kim, Namhyun Kang |
| On-Site Speaker (Planned) |
Yoona Lee |
| Abstract Scope |
Traditional materials such as 300 series austenitic stainless steels (SS) are used in cryogenic environments but face post-welding issues: (i) Solidification cracking due to low-melting-point elements P and S impurities, and (ii) Intergranular corrosion cracking from chromium carbide precipitation. Thus, alternative materials with excellent cryogenic properties should be developed to address these welding challenges. The face-centered cubic (FCC) structured ferrous medium-entropy alloy (FeMEA) without the addition of problematic trace elements has been successfully developed to meet these needs. This study evaluates the indispensable weldability of FeMEA for structural materials operating in cryogenic environments. Notably, welded FeMEA demonstrated superior cryogenic tensile properties surpassing those of the base metal. The reason behind the enhancement of cryogenic properties in welded FeMEA was systematically elucidated through the microstructural deformation mechanisms. This study suggests FeMEA could overcome deteriorating weld properties in cryogenic environments, benefiting various industries. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Joining, Phase Transformations, Environmental Effects |