Effect of cold rolling and annealing on microstructure and mechanical properties of FeMnCoCrAl high entropy alloy

doi:10.13251/j.issn.0254-6051.2020.11.020

Abstract

Abstract: (Fe₅₀Mn₃₀Co₁₀Cr₁₀)₉₄Al₆high entropy alloy was prepared in vacuum electric arc melting, and cold rolled then annealed at different temperatures to obtain layered structure composed of multi-size recrystallized grains, then the tensile properties of the annealed specimens were tested. The microstructure of the specimens was characterized by means of SEM and EBSD, and the phase composition was studied by using X-ray diffraction. The results show that the phase composition of the alloy at as-cast and cold rolled states does not change, and preferable layered microstructure composed of different size grains is obtained by annealing at 700 ℃, with the yield strength of 487 MPa, the tensile strength of 708 MPa, and the elongation after fracture of 39%, showing favorable comprehensive mechanical properties.

Key words: high entropy alloy, cold rolling, recrystallization, mechanical properties

CLC Number:

TG136

Li Hang, Li Jie, Chu Yanpeng, Jia Zhixuan, Feng Yunli. Effect of cold rolling and annealing on microstructure and mechanical properties of FeMnCoCrAl high entropy alloy[J]. Heat Treatment of Metals, 2020, 45(11): 105-114.

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