Heterogeneous Microstructure and Tensile Properties of Fe 50 Mn 30 Co 10 Cr 10 Metastable High-Entropy Alloy

Face-centered cubic (FCC)-structured high-entropy alloys (HEAs) are facing a major challenge due to a trade-off between strength and ductility. In this paper, we systematically investigated the microstructural evolution and tensile properties of metastable dual-phase (DP) FeMnCoCr HEAs via cold roll...

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Bibliographic Details
Published in:Materials 2024-12, Vol.17 (23)
Main Authors: Sun, Xiuying, Zhou, Wei, Li, Zhanjiang, Hong, Chunfu, Chang, Fa, Tian, Jun, Dai, Pinqiang
Format: Article
Language:English
Online Access:Get full text
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Summary:Face-centered cubic (FCC)-structured high-entropy alloys (HEAs) are facing a major challenge due to a trade-off between strength and ductility. In this paper, we systematically investigated the microstructural evolution and tensile properties of metastable dual-phase (DP) FeMnCoCr HEAs via cold rolling and partial recrystallized annealing, which resulted in a heterogeneous microstructure, and by inducing strengthening and strain-hardening through heterogeneous deformation-induced (HDI) strategies. The results show that the alloy was annealed at 600 °C for 10 min, exhibiting a good combination of strength and ductility. A higher alloy strength was obtained via HDI strengthening, while FCC → HCP phase transformation, deformation twins, and HDI strain-hardening contributed to the excellent ductility. The results provide a viable method for the design of subsequent alloys.
ISSN:1996-1944
1996-1944