Preparation of Ti-Ta-Mo alloy and its mechanical properties

Abstract

In order to obtain titanium alloys with better mechanical properties, Ti-Ta-Mo alloys with different element contents were obtained by spark plasma sintering with the addition of β -phase stable elements Ta and Mo to Ti. The effects of sintering temperature and the content of Ta and Mo elements on the microstructure and mechanical properties of the alloy were systematically studied. The results show that the microstructure of Ti-Ta-Mo alloy is mainly composed of α-Ti phase and β-Ti phase. With the increase of sintering temperature, the β phase in the alloy increases gradually. With the increase of Ta and Mo contents, the content of β phase in the alloy increases and the grain size decreases. When the sintering temperature is 1 250 ℃ and the Ta and Mo content (mass fraction) is 16%, the hardness and density of the alloy are higher. The compressive strength and yield strength of Ti-Ta-Mo alloy increase with the increase of sintering temperature and β -phase stable elements, while the elastic modulus shows an opposite trend.

Keywords

• ti-ta-mo alloy
• spark plasma sintering
• microstructure
• modulus of elasticity