MOLECULAR DYNAMICS SIMULATION OF TENSILE DEFORMATION OF NANOMETER MULTILAYER Cu/Ta MATERIALS

In this research, the tensile mechanical properties and microstructure evolution of Cu/Ta nanolayered composites were studied using molecular dynamics simulation method. By analyzing stress/strain relationship with different interface structures movement dislocations during stretching process, deformation mechanism materials effect on strength are revealed. The shear localization extension is also analyzed. results show that dislocation at interfaces Kurdjumov-Sachs-type Nishiyama-Wasserman-type samples parallelogram triangular defect arrays, respectively, which can easily induce two Shockley partial to slide along (111) planes, forming an intersection merging into ladder-rod dislocations. However, between Kurdjumov-Sachs š112ć-type sample exhibit parallel array characteristics, while interfacial have non-planar components, twinning. process dissociated through a set intrinsic then formed by motion, creating stacking faults (SF1), second may nucleate from adjacent SF1 plane, eventually