Abstract
Molecular dynamics simulation using EMT is conducted in order to clarify the mechanism of tensile deformation of Al nano contact. The tensile strain is applied to several models with different crystalgraphic directions (Model (a) : [001], Model (b) : [011], Model (c) : [111]). In the early stage of deformation, the nano contact is elongated by slips on {111} plane. In the case of Model (a), slips on the same direction form necking and twin boundaries. In Model (b) and Model (c), slips in the different directions, which occur at the same time, intersect each other and disarrange the crystal structure there. These cause the deformation concentration. The deformation at the late stage is brought about by not the slip but the twist of necking region.
