Improvement of microstructure homogenous and tensile properties of powder hot isostatic pressed TA15 titanium alloy via heat treatment

摘要

The TA15 powder ingots were successfully fabricated by powder hot isostatic pressing. The influence of heat treatment on the microstructural homogeneous and tensile properties has been investigated. The optimum heat treatment route was solution and aging treatment, i.e., 930 degrees C/2h/WQ + 600 degrees C/4h/AC, it attributed to improving the microstructure homogeneity. With the secondary alpha s phase precipitated within the beta matrix, the tensile strength was also improved. Furthermore, the fracture mechanisms for the different microstructures were discussed in detail.