1. Shenyang
National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Wenhua Road 72, 110016 Shenyang, China
2. Department
of Aerospace and Mechanical Engineering, Saint Louis University, Saint
Louis, Missouri 63103-1110, United States
3. Shenzhen
Key Laboratory of Nanobiomechanics, Shenzhen Institutes of Advanced
Technology, Chinese Academy of Sciences, University Town of Shenzhen, Shenzhen, Guangdong 518055, China
4. Department
of Mechanical Engineering, University of Washington, Seattle, Washington 98195-2600, United States
5. School
of Materials Science and Engineering, Lanzhou University of Technology, 730050 Lanzhou, China