Effect of Heat Treatment on Microstructure and Tensile Property of Ti-6Al-6V-2Sn Alloy

The microstructure and tensile properties of Ti-6Al-6V-2Sn alloy heat-treated at different solution aging temperatures has been systematically investigated. Specimens were solution-treated 970 °C (above the β transus) 920 (below transus), respectively, followed by water quenching. When is quenched from °C, α’ (hcp) α˝ (orthorhombic) martensite phases co-exist in microstructure. it α´ phase does not form, while equiaxial primary α (αp) are found results also show that strength increases but ductility deteriorates as temperature becomes higher when treatment unchanged. This because volume fraction αp lower acicular secondary (αs) for temperature. aged after 900 decreases with increase shows opposite trend size αs longer its