X-ray diffraction investigations of the structure of tungsten powder subjected to ultrahigh pressures
Conclusions1.Residual microstress in tungsten powder subjected to the action of pressure, over the range 23–60 kbar, at temperatures from 20 to 1200°C is virtually independent of pressure, its magnitude being of the order of the ultimate strength of the material.2.With rise in quasi-hydrostatic pressure, the regions of coherent scattering increase in size, the coarsening of the substructure being due to activation of dislocation travel by the compressive stress.