1. School of Materials Science and Engineering Hefei University of Technology Hefei 230009 China
2. Department of Design and Engineering Faculty of Science and Technology Bournemouth University Poole Dorset BH12 5BB UK
3. Materials Research Group Department of Mechanical Engineering University of Southampton Southampton SO17 1BJ UK
4. Departments of Aerospace & Mechanical Engineering and Materials Science University of Southern California Los Angeles CA 90089-1453 USA