Initiation and Mechanisms of Plasticity in Bimetallic Al-Cu Composite

We studied the shear deformation of a laminar Al-Cu composite with (100) and (110) interfaces perpendicular to lamellae in comparison pure single crystal Al Cu at strain rates 109 s−1 108 different initial pressures range from −3 GPa +50 GPa. The results molecular dynamics (MD) for plasticity initiation are generalized by means an artificial neural network (ANN) trained MD data interface, rate sensitivity parameter identified using rates. ANN-based approach allows us extrapolate much lower rates, which more relevant typical dynamic loadings. considered problem is interest as example application developed bimetallic systems, whereas previously it was tested only metals; addition, composites practical technology. interface between metals reduces strength both metals. At pressure below 10 GPa, begins aluminum part composite, while higher pressures, copper starts first. above 40 phase transition governs development. All this leads nonmonotonic dependence critical stress case without misorientation. Misorientation decreases nucleation lattice dislocation makes monotonic. Deformation modes, defect-free strain-accommodating observed can be useful technological applications related deformable conducting materials.