Phase Transition behind a Shock Front in Polycrystalline Copper

摘要

The problem of the effect of the structural state of polycrystalline metals and alloys on their thermomechanical properties is extremely important in application to the problem of fabricating new nanocrystalline highly hard materials and determining their elastic modula, yield strength, and shock adiabatic curves. In the literature, the problem on the effect of the structural state of polycrystals on their behavior as a result of shockwave loading remains far from a final solution. Despite the existing number of works [1, 2] showing an appreciable distinction in the character of shockwave propagation along single-crystalline and polycrystalline metals, the problem of determining the dependence of the shock adiabatic curve and the structure of a shock-compressed material on the grain size remains open.