Material Phase Evolution in Hypervelocity Impact Process

It is generally known that phase evolution characteristics of materials under hypervelocity impact obtained are limited by experiments. In this paper, the material point method and GRAY three-phase equation of state were combined to simulate the hypervelocity impact of Cu-Cu, Ni-Ni and Al-Al at different velocities, and the relations between phase distribution and time were obtained. The numerical results show that the phase evolution character of the material with higher density and lower melting point at lower velocity impact is similar to the material with lower density and higher melting point at higher velocity impact. Therefore, the phase evolution characteristics of material with higher density and lower melting under hypervelocity impact point could provide reference to the experiment of common structure materials such as Al under hypervelocity impact.