1. State Key Laboratory for Powder Metallurgy Central South University Changsha 410083 China
2. Xi'an Sailong Metal Materials Co., Ltd Northwest Institute for Nonferrous Metal Research Xi'an 710016 China
3. Key Laboratory of Radiation Physics and Technology of Ministry of Education Institute of Nuclear Science and Technology Sichuan University Chengdu 610064 China
4. China National Erzhong Group Deyang Wanhang Die Forging Co., Ltd Deyang 618000 China