Effect of Rare-Earth Elements and Heat Treatment on the Structure and Properties of a Heat-Resistant Cast Mg–REM–Zr Magnesium Alloy

Abstract

Experimental compositions of a new heat-resistant cast magnesium alloy are considered, the compositions are corrected, and the optimum compositions of the new cast magnesium alloy with rare-earth metals (REMs) are selected for durability tests at a high temperature. Heat treatment conditions are corrected. The structure and mechanical properties of the cast Mg–REM–Zr magnesium alloy are studied. Tests of the mechanical properties of individually cast samples and the samples cut from an experimental casting (aggregate cover) are performed at room and elevated temperatures.