Effect of homogenization treatment on the microstructure and mechanical properties of Fe-based medium entropy alloys

Abstract

Abstract: The (Fe_63.3Mn₁₄Si_9.1Cr_9.8C_3.8)_98.5Y_1.5(Y=Cu、Ag)、(Fe_63.3Mn₁₄Si_9.1Cr_9.8C_3.8)₉₇Cu_1.5Ag_1.5 were prepared by water-cooled copper crucible magnetic levitation melting-copper mold negative pressure suction casting method.The effect of homogenization temperature and time on mechanical properties was studied by establishing the uniformization kinetic equation.(Fe_63.3Mn₁₄Si_9.1Cr_9.8C_3.8)_98.5Y_1.5(Y=Cu、Ag) and (Fe_63.3Mn₁₄Si_9.1Cr_9.8C_3.8)₉₇Cu_1.5Ag_1.5 medium entropy alloys were homogenized at 873, 973, 1 073, 1 173, 1 273 K, respectively. The relationshipwas investigatedbetween its organizational structure and compression performance. The results showed that the uniform distribution of alloying elements is applied and the segregation is significantly reduced, The homogenization alloy is phase stable and still has an fcc structure at 1 173 K, and the compressive mechanical properties of the entropy alloy of (Fe_63.3Mn₁₄Si_9.1Cr_9.8C_3.8)₉₇Cu_1.5Ag_1.5 is the best at 1 173 K, and the compressive strength and plastic strain were 3 992.4 MPa and 35.75%, respectively, and the experimental results were consistent with the calculational prediction of the equation of homogenization diffusion kinetics.

Key words: MEAs, homogenization, diffusion kinetics, microstructure, mechanical properties

CLC Number:

TG139.8

ZHAO Yan-chun, SHI Zi-qiang, ZHANG Lin-hao, ZHANG Min-ya, KOU Sheng-zhong. Effect of homogenization treatment on the microstructure and mechanical properties of Fe-based medium entropy alloys[J]. Journal of Lanzhou University of Technology, 2023, 49(1): 1-6.

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