Molecular dynamics simulation of impact on a high entropy alloy with void

Molecular dynamics simulation was used to simulate the impact of high entropy alloy crystals with voids. The collapse mechanism of voids was plastic and internal jet. The microscopic collapse process of the cavity is closely related to dislocation nucleation and growth. Under the influence of lattice distortion of high entropy alloy, the main type of dislocation is Shockley dislocation, and a large number of incomplete dislocation structures with small expansion degree are generated around the void. Compared with the <110> crystal direction, the particles impacted along the <100> crystal direction are more likely to slip along the dislocation direction and void collapse when dislocation occurs.