Characterization of Nanocrystalline W-based Alloys
Nanocrystalline W-based alloys are appealing for use in situations where high toughness and abrasion resistance are required. W-based alloys were produced by consolidation of ball-milled powders using pulsed electric current sintering (PECS). PECS allows for rapid consolidation at a fraction of the melting temperature, resulting in alloys with relatively high densities, reduced grain sizes, and improved mechanical properties. Depending on the alloy composition and consolidation parameters, several different phases were observed in the resulting samples. Samples were tested in uniaxial compression to determine fracture strength. Hardness and x-ray diffraction data was also gathered for each sample. These samples displayed higher compression strength and hardness than many baseline crystalline materials.