Effect of Ti Content on Microstructure and Mechanical Properties of Mg-Sn Alloys Produced by Casting and Hot Extrusion

Abstract

Magnesium (Mg) alloys have received significant attention in various fields of applications due to their low density, high specific strength, good machinability, and damping properties. In this study, Mg95-xSn5Tix (x = 0, 0.15, 0.75, 1.5 wt.%) alloys were produced through casting and hot extrusion; the effect of Ti content was investigated on microstructure and mechanical properties using microscopical analysis, x-ray diffraction, tensile, compaction, and Vickers hardness tests. The obtained results indicated that the presence of Ti leads to sensible grain refinement and a decrease in dendrite arm spacing (DAS). Ti content of 0.15 wt.% caused a fine and homogenous distribution of Mg2Sn phases. The results showed with an increase in Ti content up to 0.75 wt.%, the lotgering factor (LF) of (002) plane decreased, indicating reduced texturing. The sample with 0.75 wt.% showed the greatest ultimate tensile strength (296 ± 6 MPa), and the sample with 1.5 wt.% Ti resulted in the highest ultimate compression strength (479 ± 13 MPa).