1. School of Aeronautics, Northwestern Polytechnical University, Xi’an, China
2. State Key Laboratory of Solidification Processing, Shaanxi Key Laboratory of Friction Welding Technologies, Northwestern Polytechnical University, Xi’an, China
3. School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an, China
4. School of Mathematics and Statistics, Northwestern Polytechnical University, Xi’an, China