Affiliation: | a Key Laboratory of Metastable Materials Science and Technology, Hebei, Yanshan University, Qinhuangdao 066004, People's Republic of China b Faculty of Engineering, Hiroshima University, Hiroshima 739-8511, Japan c Academic Frontier Research Center for Ultra-high Speed Deformation, Hiroshima Institute of Technology, Hiroshima 731-5193, Japan |