Elastic moduli of Al-Si and Al-Ge solid solutions

The elastic moduli of Al-Si and Al-Ge alloys obtained by solid-solution under pressure are investigated theoretically using a previous treatment based on the microscopic electronic theory. The obtained results for elastic coefficients such as bulk modulus, shear modulus, Young's modulus and Poisson's ratio for matrix Al are in good agreement with temperature-dependent experimental data. These moduli of Al-Si and Al-Ge alloys are calculated, and the concentration dependence of the elastic data is presented quantitatively.