Molecular dynamics studies on interaction between a screw dislocation and a void in pure Fe, 5

Taniguchi, Keisuke*; Onitsuka, Takashi*; Fukumoto, Kenichi*; Suzudo, Tomoaki   

It is known that a cause of irradiation hardening of nuclear materials by neutron irradiation can be ascribed to voids as an obstacle against dislocation motion. In this research, molecular dynamics (MD) simulations were exploited in order to analyze the dynamical reaction mechanism at the atomic level of the screw dislocation and void in BCC pure Fe. In particular, the relationship between the dislocation-void contact position and the strength of interaction was analyzed. As a result, it turned out that there is a rule between the contact position and the shear stress.