Microstructural and Mechanical Properties of a Heat-Treated EV31A Magnesium Alloy Fabricated Using the Stir-Casting Process

This study aims to prepare a stir-cast EV31A magnesium alloy and investigate the effects of T4 condition (solid solution strengthening) T6 strengthening cum age hardening) on phases, microstructure, mechanical properties, fractography. The solid at 520 °C for 8 h allows Rare-Earth Elements (REE) dissolve in Mg matrix, but solubility is limited by presence Zn. phenomenon responsible heat-treated alloy’s strengthening, which raises UTS 212 MPa. formation new grains within causes an increase grain boundaries dislocations during heat treatment process, increasing strength (UTS) 230 In all three test conditions, fractography tensile samples revealed cleavage-ductile/mixed mode fracture. As expected, fine-grained sample exhibited superior expense ductility.