1. Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) & Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, People's Republic of China
2. Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
3. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA