Microstructure Transformation of Mg-1.6Gd during Hot Rolled at High Deformation Ratio

Abstract

Mg-1.6Gd alloy was prepared by hot rolling to produce a potentially degradable implant materials. Microstructural transformation during hot rolling was observed and correlated to mechanical properties. The objective of this study was to examine the constituents of the microstructure such as grain size, phases which are contributed to mechanical properties. Hot rolled Mg-1.6Gd alloy was performed at a temperature range of recrystallization (400-550 °C) with a speed of 10 mm/min and reduction of 95%. The hot rolled was employed by two methods: unidirectional rolling (UR) and cross rolling (CR). The results show that both of the hot rolling techniques reveal refine microstructure with the grain size range of 50-130 µm. The number of lamellar in every grain were shown on the UR, while for the CR resulted in many precipitates, especially at the highest temperature hot rolling. The hot rolled sample of 95% reduction had the relatively smaller of the grain size than the hot rolled sample of 30% reduction (200 µm).