1. State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals; School of Material Science and Engineering; Lanzhou University of Technology; Langongping Road 287 Lanzhou City Gansu Province 730050 P.R. China
2. Department of Aerospace and Mechanical Engineering; University of California; San Diego CA 92093-0411 USA
3. Faculty of Engineering; Department of Mechanical Engineering; King Mongkut's Institute of Technology Ladkrabang; Bangkok 10520 Thailand
4. Departments of Aerospace & Mechanical Engineering and Materials Science; University of Southern California; Los Angeles CA 90089-1453 USA