Shear-induced chemical disordering in Ni 3Al at different temperatures

Abstract

Molecular dynamics simulations have been used to study shear-induced chemical disordering in Ni 3Al lattices at different temperatures and strain rates. Shearing determines the formation of an amorphous layer, the thickness of which increases linearly with the square root of time. The rate at which the amorphous layer grows is both shearing rate- and temperature-dependent. A linear correlation between the amorphous layer growth rate and the shear modulus is found. This suggests that mechanical properties could play a central role in shear-induced disordering processes.