Synthesis and characterization of rapidly solidified magnesium alloy
LI Jie-qiong1.2,WANG Lu 1,CHENG Huan-wu1,L? Guang-shu1,ZHANG Hai-feng 2,WANG Ai-min 2 (1. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;2. Chinese Academy of Sciences, Institute of Metal Research,Shenyang 110016, China)
Rapidly solidified magnesium alloy was synthesized successfully by copper mould casting. Microstructure and the mechanical properties of conventional casting alloy and rapidly solidified alloy were studied contrastively. Microstructure of rapidly solidified AZ91HP alloy was greatly refined through the process of rapid solidification compared with that of as-cast AZ91HP alloy. The morphology of brittle β-Mg17Al12 phase in rapidly solidified magnesium was granular instead of reticular in conventional casting alloy. Rapidly solidified magnesium demonstrates higher compressive fracture strength of 494 MPa, increased by 77 percent compared to conventional casting alloy.