1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
2. National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China
3. Chongqing Chang-an Automobile Co. Ltd, Chongqing 400023, China
4. Chongqing Academy of Science and Technology, Chongqing 401123, China