JAUE2024-064: Influence of Lead Addition on The Microstructure and Texture Evolution in Magnesium alloy

Abstract

As global warming accelerates, the transportation industry is increasingly turning to lightweight materials to reduce carbon emissions. Magnesium is a promising option, but its poor formability limits its broader application, making research into improving its properties essential. While rare-earth elements are known to effectively control texture development in magnesium alloys, their high cost limits their commercial viability. In this study, we explored changes in microstructure and texture by adding lead (Pb), which is expected to have similar effects to rare-earth elements. The material used was a Mg-15wt%Pb alloy. Initial specimens were obtained through rolling at 673 K to a reduction of 25%, followed by heat treatment. Plane strain compression was then performed at 723 K with a strain rate of 5×10^-2 s^-1 and a strain range from -0.4 to -1.0. As a result, recrystallized grains formed within the microstructure, and the main texture component shifted from (0,0) to (30,26). The maximum axial density, which initially measured 10.01, decreased to 4.23 after compression.