Elastic properties and electronic structures of L12 Co3(Ge,W)

The method of augmented plane wave plus local orbitals has been employed to study the elastic constants and electronic structures of Co3(Ge,W) precipitate with L12 structure in Co-base alloys. Based on the calculated results, the elastic properties of Co3(Ge,W) precipitate were investigated. Young’s and shear moduli of the polycrystals for Co3(Ge,W) precipitate were calculated using Voigt–Reuss–Hill averaging scheme. The calculated results of elastic properties showed that the Co3(Ge,W) precipitate has a strengthening effect in the Co matrix, owing to the larger shear modulus differences between Co3(Ge,W) and Co matrix. The calculated results also showed that Co3(Ge,W) precipitate is ductile in nature.