Characterization of Microstructure and Mechanical Properties of TiNbZr Alloy during Heat Treatment

TiNbZr alloy was prepared by vacuum consumable arc melting furnace. The effects of solution and aging heat treatment on the microstructure and mechanical properties of this alloy were studied. The results show that ultimate tensile strength over 1000 MPa can be obtained when the alloy is solutioned for 1 h and then aged at 300 and 350 °C. α phase precipitation appears under the condition of the treatment of solution for 1 h, followed by aging at 400 °C and 450 °C. The aging time plays an important part in α phase precipitation. The ultimate tensile strength increases to 850 MPa and the elongation keeps around 11% when the alloy is aged at 400 °C for 9 h.