抄録
Dislocation emission phenomena from Al metastable grain boundaries with <110> or <112> tilt axis are researched by molecular dynamics simulations used an EAM potential. Metastable grain boundaries are obtained by controlling the atomistic relative displacement of neighboring grains with a fixed misorientation angle. Analysis models containing metastable grain boundaries are deformed in tension at the strain rate of 1×10^9 1/s at 10 K. As results, the relationship between the geometrical information of grain surface steps and the Burgers vector of emitting dislocations is a key factor to the ability of dislocation source of grain boundaries and furthermore the relative displacement of surface steps of each grain also strongly influences the dislocation emission phenomena from metastable grain boundaries.
