1. College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan, PR China
2. Shanxi Key Laboratory of Advanced Magnesium-based Materials, Taiyuan, PR China
3. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, PR China
4. Department of Mechanical Engineering, The Behrend College, Pennsylvania State University, Erie, PA, USA