Abstract
A comparative study on nominal composition of W based alloy W80Ti10Mo10 (alloy A) and W90Ti5Mo5 (alloy B) (all in wt. %) has been produced through mechanical alloying for 20 h. The 20 h powders were compacted at 5 ton pressure followed by conventional sintering at 1400 °C for 1 h holding time with continuous argon (Ar) flow. The microstructure and the phases of powders and sintered samples has been analyzed using X-ray diffraction (XRD), Particle size analyzer and Scanning electron microscopy (SEM). Minimum of 13.32 nm crystallite size and maximum lattice strain 0.2% found in alloy B. Higher dislocation density of 28.45 (1016/m2) observed in alloy B because of high tungsten content. Maximum particle size (385.6 nm) refinement was observed in alloy B. Maximum Sinterability of 87% and hardness of 5.8 GPa found in alloy B because it’s fine crystallite size. Oxidation resistance of alloy B has been found higher then alloy A during exposure at 1000 °C for 10 h.
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