1. College of Electrical Engineering and Automation, Guilin University of Electronic Technology, Guilin 541000, PR China
2. State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China
3. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710129, China
4. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710129, China