1. Department of Metal Materials, College of Materials Science and Engineering, Hunan University, Changsha 410082, China
2. Transmission R&D Center, AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412002, China
3. Chongyi Zhangyuan Tungsten Industry Co., Ltd., Chongyi 341300, China
4. Department of Materials Science and Engineering, The State University of New York (SUNY), New York, NY 11794 2275, USA