Evolution of dislocation mechanisms in single-crystal Cu under shock loading in different directions

Even though there are numerous experiments and molecular dynamic simulations of Cu under shock loading, there appears to be no literature on the evolution of different types of dislocation mechanisms and their mutual interactions during the process of shock loading, which this article addresses through molecular dynamic simulations using the Mishin EAM potential for Cu. Three different directions $⟨100⟩$, $⟨110⟩$, and $⟨111⟩$ that have been considered in this article are subjected to shock compression with piston velocities ranging between 0.3–3 km s⁻¹. The evolution of Hirth locks, Lomer–Cottrell locks, cross-slips, jogs, and dislocation-originated stacking-fault tetrahedra are demonstrated in this article for different direction shock loading of single-crystal Cu. (paper)