1. Key Lab of Materials Physics, School of Physics and Engineering, Zhengzhou University, Zhengzhou 450052, Henan, China
2. Key Lab of Materials Physics, School of Physics and Engineering, Zhengzhou University, Zhengzhou 450052, Henan, China e-mail:
3. Manufacturing Systems Research Lab, General Motors Research and Development Center, 30500 Mound Road, Warren, MI 48090