K-0845 Estimation of Static Mechanical Properties on Tungsten short Fiber Reinforced Ti-6Al-4V alloy by HIP Fabrications

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The fatigue properties of tungsten short fiber reinforced Ti-6Al-4V alloy (W/Ti-6Al-4V) and Ti-6Al-4V alloy by HIP (Hot Isostatic Pressing) and secondly treatments (Die Forging, Rotary Swagin) were investigated and compared with those of conventional Ti-6Al-4V alloy. According to the results in the present work, the average hardness of the diffusion phase of composite materials and the fatigue limit of HIP-DF-0 show values about 20-30% and 40% higher, respectively than that of the conventional Ti-6Al-4V alloy. However, the fatigue limits of the MMCs unexpectedly deteriorated in comparison to the conventional material. The deterioration of the fatigue limit was considered to be caused by defects in the microstructure of the composites.

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