Effect of secondary orientation on micromechanical properties of nickel base single crystal superalloy

In this paper, the mechanical properties and microstructure evolution of Ni based single crystal superalloy with different secondary orientations under stress loading were studied by molecular dynamics (MD) simulation. The MD model is a supercell structure established with three-dimensional cubic mosaic units, and the volume fraction of the γ'precipitated phase is 65%, which is similar to the structure of the actual material. The effect of secondary orientation on the tensile properties of superalloy was analyzed on the atomic scale, and the mechanism of the secondary orientation on tensile deformation and fracture was discussed systematically. The work in this paper will be helpful to understand the tensile deformation behavior of superalloy from an atomic point of view.