Effect of Titanium Hydride Content on Near-alpha Multicomponent High Temperature Titanium Alloy

Near-alpha multicomponent high temperature titanium alloy was prepared through powder metallurgy using titanium hydride and titanium powder as the main raw materials,and the effect of titanium hydride content on the microstructure and mechanical properties of the alloy was investigated.The results show that with the increase of titanium hydride content,oxygen content in the alloy decreases gradually,and the density of the alloy gradually increases reaching 95.45%.With the increase of titanium hydride content,both of the mechanical properties and hardness of the alloy increase,having the tensile strength and hardness reached to 460.1 MPa and 298.4 HV,respectively.With the increase of titanium hydride content,the alloy changes from equiaxed structure to strip-like basket structure,accompanying the increase of strip-like alpha phase and the solubility of Al element in alpha phase,as well as the gradual decrease of porosity in the samples.It indicates that the properties of near-alpha multicomponent high temperature titanium alloy prepared from titanium hydride powder can be significantly improved.