Shear Localization and Mechanical Properties of Cu/Ta Metallic Nanolayered Composites: A Molecular Dynamics Study

With their excellent mechanical properties, Cu/Ta metallic nanolayered composites (MNCs) are extensively applied in aerospace and nuclear industry facilities. However, shear localization severely disrupts the ability of these materials to deform uniformly, attracting many researchers. The necessary time length conditions experiments limit investigation localization; thus, relevant studies insufficient. molecular dynamics simulation perfectly corresponds short duration high strain rate deformation process. Therefore, this study, we used simulations explore effect layer thickness on MNCs with Kurdjumov–Sachs (KS) orientation–related interfaces. Our research demonstrates that occurs samples thicknesses below 2.5 nm, resulting an inverse size flow strength. quantitative analysis indicates asymmetry dislocations slip transmission across interface causes rotation. This activates parallel glide beyond distance individual thicknesses, eventually forming bands. Both rotation sliding dominate plastic band region. In addition, dislocation density amorphous phase increase decreasing thickness.