Preparation of semi-solid billet of magnesium alloy and its thixoforming

来源期刊：中国有色金属学报(英文版)2007年第1期

论文作者：姜巨福 罗守靖

文章页码：46 - 46

Key words：magnesium alloy; thixoforming; equal channel angular extrusion(ECAE); semi-solid billet; mechanical properties

Abstract: Preparation of semi-solid billet of magnesium alloy and thixoforming was investigated by applying equal channel angular extrusion to magnesium alloy. The results show that mechanical properties of AZ91D alloy at room temperature, such as yield strength(YS), ultimate tensile strength(UTS) and elongation, are enhanced greatly by four-pass equal channel angular extrusion(ECAE) at 573 K and microstructure of AZ91D alloy is refined to the average grain size of 20 μm. Through using ECAE as strain induced step in SIMA and completing melt activated step by semi-solid isothermal treatment, semi-solid billet with fine spheroidal grains of 25 μm can be prepared successfully. Compared with common SIMA, thixoformed satellite angle frame components using semi-solid billet prepared by new SIMA have higher mechanical properties at room temperature and high temperature of 373 K.

基金信息：the National Natural Science Foundation of China