2027 鉄中の銅析出物とらせん転位の相互作用の分子動力学シミュレーション(J01-1 材料や構造の破壊/損傷/マルチスケール解析(1),J01 材料や構造の破壊/損傷/マルチスケール解析)

抄録

Molecular dynamics simulations of interaction between a copper precipitate and a screw dislocation in iron were performed. The copper precipitates are considered as a harmful element in the neutron irradiation embrittlement of reactor pressure vessel steels. In the simulations, we applied a shear stress to atomic model, and gradually increase until the screw dislocation cuts through the copper precipitate. Then we investigated the critical resolved shear stress (CRSS) and the mechanism to break away from the copper precipitate.