Analysis of the effect of solubility on the densification behavior of tungsten heavy alloys using the master sintering curve approach

► Master sintering curves are used to analyze densification of three tungsten alloys. ► Apparent activation energies are used to determine roles of diffusion mechanisms. ► Grain boundary diffusion contributes more to densification for W-Ni-Cu than for W-Ni-Fe. ► Grain boundary diffusion is significant for W-Cu after liquid phase formation. ► A master sintering surface is developed for tungsten alloys with varying solubilities.