Hot Rolling Speed on Microstructure,Macro texture and Mechanical Properties of Mg-2.5Al-1.0Sn-0.3Mn-0.4La-0.16Gd Mg Alloy

Abstract

This study aims to search for microstructure and tensile properties (at 25°C), of Mg-2.5Al-1.0Sn-0.3Mn-0.4La-0.16Gd Mg alloy produced by low pressure die casting method. The hot rolling process was exposed to the produced alloy at different three speeds of 1.5, 4.7, and 10 m/min. The increased hot rolling speeds resulted in decreased average grain size, twins fraction, and hardness Brinell but the increased DRXs formation. The rising of hot rolling speeds enabled the rising YS, UTS, and elongation % values. The fragmentation of secondary phases including La and Gd demonstrated homogeneously distribution inside the matrix phase of the specimen hot-rolled at 10 m/min which enhanced the room temperature tensile properties. The intergranular and secondary phases introduced cracking formed in the hot-rolled specimens at lower and higher speeds, respectively.