Study on the mechanical properties of tungsten alloys with respect to tungsten content and post-treatment processes

This study employs three tungsten alloys of considerable density to investigate the influence of dehydrogenation treatment and post-forging on their strength and toughness. Characterization tests are conducted using scanning electron microscopy, energy-dispersive spectrometer, and universal testing machine. The results demonstrate that the forging process results in a reduction in the size of the tungsten particles. The larger the original size, the more significant the grain refinement and the lower the tungsten-tungsten adjacency. An elevated tungsten content increases the proportion of cleavage, which in turn reduces tensile strain and strength. Although forging increases tensile strength, the material's elongation is significantly reduced due to the mismatch in thermal expansion coefficients.