FEM simulations of tensile deformation and fracture analysis for CuW alloys at mesoscopic level

► The Voronoi technology is employed to describe the microstructure of CuW alloys. ► Shear bands induced microcracks appear at the Cu/W and W/W interfaces mostly. ► Mechanical strength of CuW alloys is determined by sintering neck mainly. ► The microdeformation process and fracture mechanics of CuW alloys is revealed.