State Key Laboratory of Traction Power;
School of Mechanics and Engineering;
Southwestfiaotong University;
Chengdu 610031;
China;
School ofMateriais Sdence and Engineering;
Northwestern Polytechnical University;
Xi'an 710072;
China;
Department ofMateriais Sdence and Engineering;
Advanced Materials Processing and Analysis Center;
University of Central Florida;
Orlando;
FL 32816;
USA;