A Rolled Mg–8Al–1Sm–1Zn Alloy with High‐Strength Ductility via Single‐Pass Liner Rolling

Abstract

In this article, the microstructure and mechanical properties of Mg–8Al–1Sm–1Zn alloy prepared by multi‐pass conventional rolling and single‐pass liner rolling are investigated. The alloy is subjected to multi‐pass conventional rolling with a cumulative deformation of 60% and single‐pass liner rolling with a deformation of 60% after solution‐treated (T4 temper) at 400 °C, respectively. In the results, it is shown that the best mechanical properties are obtained by single‐pass liner rolling at 400 °C with a deformation of 60% deformation under the combined effect of grain refinement and precipitation strengthening. The average grain size of the alloy is 7.2 μm and the microhardness is 80 HV. The tensile yield strength, ultimate tensile strength, and elongation at room temperature are 255 MPa, 285 MPa, and 12.7%, which are 14.9%, 15.3%, and 10.4% higher than those of the conventional multi‐pass rolled alloy, respectively.