1. Department of Mechanical Engineering, State Key Laboratory of Tribology, Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Ministry of Education of PR China, Tsinghua University, Beijing 100084, People's Republic of China
2. Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
3. School of Material Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
4. Centre for Advanced Materials Joining, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada