Physical and Numerical Simulation for Inner Crack Healing in Metals  

作　　者：Jingtao HAN Dongbin WEI Yongjun ZHANG 

机构地区：[1]School of Material Science and Engineering, UST Beijing ,100083, P.R.China University of Wollongong, NSW 2522 Australia SHOUGANG Research Institute of Technology, Beijing, 100041, P.R.China

出　　处：《上海交通大学学报》2004年第z2期130-135,共6页Journal of Shanghai Jiaotong University

基　　金：The authors acknowledge the support of the project of key program (59889101) of the National Natural Science Foundation of China (NSFC).

摘　　要：The research purpose on the healing of inner crack in metallic materials is to provide an effective approach for improving their properties and prolonging their lifetime. The crack healing process of 20MnMo steel with inner pre-crack was analyzed. It was found that all inner cracks could be healed in different degree. There were very fine ferrite grains in healing region. The micro-crack healing process in single crystal of BBC-Fe was simulated by the molecule dynamics method, which showed that the critical temperature of crack healing in BBC-Fe is 673K. There were micro-voids, dislocations and twins left after crack healing.

关 键 词：METAL INNER CRACK HEALING simulation 

分 类 号：N55[自然科学总论]