Effect of TiB Content on Properties of Automotive Titanium Matrix Composites with Vacuum Hot Pressing Sintering

In order to obtain the preferred TiB content in titanium based materials, the influence of TiB content on the properties of automotive titanium matrix composites was studied and analyzed.The automotive titanium matrix composites samples were prepared by vacuum hot pressing sintering with different TiB reinforcement particles added to the titanium based material samples.The tensile properties at room temperature and oxidation properties at high temperature were tested and analyzed.The results show that when TiB content increases from 0.5vol%to 13vol%, and the tensile properties and high temperature oxidation properties of the samples first increase and then decrease.When TiB content is 0.5vol%- 8vol% , the tensile fracture of the sample is quasi ductile fracture, and when the TiB content is 10.5vol%and 13vol% (volume fraction), the tensile fracture of the sample is quasi cleavage fracture.TiB content is preferably 8vol%.At this time, the tensile strength of the sample is 1103 MPa, the elongation after fracture is 19.36%, and after 600 ℃×24 h high temperature oxidation, the oxidation weight per unit area is 6.3 g/cm².