Influence of retained hydride particles and microstructure on mechanical properties of PM produced Ti-6Al-4V alloy

Abstract

Compacts of Ti-6Al-4V alloy were produced via the powder metallurgy technique applying the hydride-dehydride process and hot isostatic pressing. The conditions of reversible hydride-dehydride process were controlled by chemical and X-ray diffraction analysis and scanning electron microscopy. Powders were pressed above and below the alpha - GT beta transus temperature. The presence of titanium hydrides and morphology of the microstructure have the direct influence on the tensile properties and fracture toughness of the Ti-6Al-4V alloy, but the effect of microstructure is more pronounced.