1. Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu 610213 China
2. Center for Advancing Materials Performance from the Nanoscale State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 P. R. China
3. School of Materials Science and Engineering Southwest Jiaotong University Chengdu 610031 P. R. China
4. Department of Mechanical Engineering National University of Singapore 9 Engineering Drive 1 Singapore 117576 Singapore