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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Phase Transformations and Microstructural Evolution
Presentation Title Shape memory effect in the CrFeCo and CrMnFeCoNi multi-component system
Author(s) Jinsurang Lim, Hwi Yun Jeong, Hyunseok Oh, Je In Lee
On-Site Speaker (Planned) Je In Lee
Abstract Scope The concept of high-entropy alloy (HEA) design has attracted significant interest for finding novel structural and functional materials with exceptional properties. In the present study, we show the martensitic transformation between austenite fcc and martensite hcp phases in the CrMnFeCoNi and CrFeCo alloy systems. The martensitic transformation in the fcc HEAs was predicted by calculating the difference in Gibbs free energy of fcc and hcp phases via CALPHAD approach. It was found that initial microstructure, martensitic transformation temperature, and shape memory properties were strongly affected by varying Co/Ni and Fe/Mn ratio in the HEA system. To enhance the recovery strain of the novel HEAs, the effect of grain size and alloying elements was systematically investigated. These results could open a new application of multi-principal element alloys as low- and/or high-temperature shape memory alloys.
Proceedings Inclusion? Planned:
Keywords High-Entropy Alloys, Phase Transformations, Mechanical Properties

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Effect of Co/Ni ratio on shape memory effect of the CrMnFeCoNi multi-component alloys
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