Effect of annealing process on microstructure and mechanical properties of FeCrMnNiAl0.1 high-entropy alloy

doi:10.13251/j.issn.0254-6051.2023.05.038

Abstract

Abstract: FeCrMnNiAl_0.1 high-entropy alloy was prepared by arc melting method. The effects of annealing treatment heating rate and holding time on microstructure and mechanical properties of the five component alloy were studied by means of SEM, XRD, microhardness tester and universal tensile testing machine. The results show that the FeCrMnNiAl_0.1 high-entropy alloy consists of FCC phase, BCC phase and tetragonal Cr₃Ni₂. The prolongation of annealing holding time leads to an increase in lattice distortion and BCC structure content of the alloy. Increasing the heating rate makes the content of BCC structure also increase, but the degree of lattice distortion decrease. The hardness of the non-heat treated alloy is around 190 HV, and the microhardness of the high-entropy alloy increases with the prolongation of the annealing holding time, but the microhardness gradually decreases with the increase of heating rate. With the prolonging of holding time during annealing, the tensile strength of the high-entropy alloy gradually increases, while the ductility decreases. With the increase of heating rate, the tensile strength of the alloy first decreases and then increases, and the ductility becomes better.

Key words: FeCrMnNiAl_0.1 high-entropy alloy, annealing, holding time, heating rate, microstructure and properties

CLC Number:

TG156.1

Guo Baochang, Jiang Fengyang, Wang Junbo, Liu Jiangnan, Liu Langlang. Effect of annealing process on microstructure and mechanical properties of FeCrMnNiAl_0.1 high-entropy alloy[J]. Heat Treatment of Metals, 2023, 48(5): 246-251.

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Effect of annealing process on microstructure and mechanical properties of FeCrMnNiAl_0.1 high-entropy alloy

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