Tensile properties of the Cr–Fe–Ni–Mn non-equiatomic multicomponent alloys with different Cr contents

Abstract

Abstract A series of Fe40Mn28Ni32 − xCrx (x = 4, 12, 18, 24 (at.%)) multicomponent alloys was prepared by vacuum arc melting. The Fe40Mn28Ni28Cr4, Fe40Mn28Ni20Cr12 and Fe40Mn28Ni14Cr18 alloys were ductile single phase fcc solid solutions. The Fe40Mn28Ni8Cr24 alloy had intermetallic sigma phase matrix and was extremely brittle after homogenization. The tensile properties of the Fe40Mn28Ni28Cr4, Fe40Mn28Ni20Cr12 and Fe40Mn28Ni14Cr18 solid solution alloys were examined in recrystallized condition with average grain size of ~ 10 μm. The yield strength increased from 210 MPa of the Fe40Mn28Ni28Cr4 alloy to 310 MPa of the Fe40Mn28Ni14Cr18 alloy. The elongation to fracture of the alloys decreased from 71% to 54%, respectively. Solid solution strengthening by the constitutive elements of the alloys was calculated using Labush approach. Strong solid solution strengthening by Cr was predicted. Gypen and Deruyttere approach was used to estimate solid solution strengthening of the Fe40Mn28Ni32 − xCrx alloys. Good correlation between predicted solid solution strengthening and the experimental yield strength values was found.