Molecular dynamics evaluation of the impact of Ga, He, and vacancy concentration on the mechanical properties of Ga-stabilized δ-Pu

The effects of self-irradiation on the mechanical properties of Ga-stabilized δ-Pu are investigated by means of classical molecular dynamics simulations using a modified embedded-atom method interatomic potential. The impact that variations in the concentration of Ga, He, and vacancies have on the elastic properties (Young’s modulus, Poisson’s ratio, shear modulus, and bulk modulus) of Ga-stabilized δ-Pu is determined through CMD simulation. The effect that variations in these concentrations have on plastic flow is assessed at strain rates of 107–1010 s−1. Comparison is made to experimental data.