Plastic flows of in-situ metallic glass matrix composites upon dynamic loading

Abstract In-situ dendrite/metallic glass matrix composites with a composition of Ti62Zr12V13Cu4Be9 upon dynamic loading exhibit distinguishing plasticity. It is found that a positive strain-rate sensitivity of the flow stresses with the strain rates dominates in such in-situ dendrite-reinforced composites. The Johnson–Cook (J–C) plasticity model is employed to model the flow behavior, and the constitutive relationship is obtained as σ = ( 1350 + 54 e − 0.03 ) ( 1 + 0.003 ln e . ⁎ ) . The ductile dendrites accommodate plasticity, characterized by the multiplication of dislocations and lattice distortions, together with the appearance of Moire patterns.