The mechanical response of a bi-crystal model with a 90°grain boundary under external compressive and tensile loading parallel to the boundary plane normal was investigated with molecular dynamics simulations.The...The mechanical response of a bi-crystal model with a 90°grain boundary under external compressive and tensile loading parallel to the boundary plane normal was investigated with molecular dynamics simulations.The grain boundary was found to migrate along two opposite directions upon compressive and tensile straining,with the formation of inter-connected coherent twin boundary and basal/prismatic boundary.The atomic details of such grain boundary migration were unraveled,which indicated the role of interface dislocations.The temperature effect was also discussed.展开更多
基金This work was supported partially by the Open Research Fund from the State Key Laboratory of Rolling and Automation,Northeastern University(No.2019RALKFKT011)the National Natural Science Foundation of China(No.51871220)+1 种基金the Natural Science Foundation of Liaoning Province of China(No.2020-KF-14-01),the Shenyang Talents program(No.RC200230)the Opening Project of National Key Laboratory of Shock Wave and Detonation Physics(No.6142A03203002).
文摘The mechanical response of a bi-crystal model with a 90°grain boundary under external compressive and tensile loading parallel to the boundary plane normal was investigated with molecular dynamics simulations.The grain boundary was found to migrate along two opposite directions upon compressive and tensile straining,with the formation of inter-connected coherent twin boundary and basal/prismatic boundary.The atomic details of such grain boundary migration were unraveled,which indicated the role of interface dislocations.The temperature effect was also discussed.
