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Tensile Response of As-Cast CoCrFeNi and CoCrFeMnNi High-Entropy Alloys
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Tensile Response of As-Cast CoCrFeNi and CoCrFeMnNi High-Entropy Alloys
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Journal Article
Tensile Response of As-Cast CoCrFeNi and CoCrFeMnNi High-Entropy Alloys
2022
Overview
In this research, we systematically investigated equiatomic CoCrFeNi and CoCrFeMnNi high-entropy alloys (HEAs). Both of these HEA systems are single-phase, face-centered-cubic (FCC) structures. Specifically, we examined the tensile response in as-cast quaternary CoCrFeNi and quinary CoCrFeMnNi HEAs at room temperature. Compared to CoCrFeNi HEA, the elongation of CoCrFeMnNi HEA was 14% lower, but the yield strength and ultimate tensile strength were increased by 17% and 6%, respectively. The direct real-time evolution of structural defects during uniaxial straining was acquired via in situ neutron-diffraction measurements. The dominant microstructures underlying plastic deformation mechanisms at each deformation stage in as-cast CoCrFeNi and CoCrFeMnNi HEAs were revealed using the Convolutional Multiple Whole Profile (CMWP) software for peak-profile fitting. The possible mechanisms are reported.
Publisher
MDPI AG
Subject
