Effect of heat treatment on microstructures and tensile properties of as-forged Ti-45Al-5Nb-0.3Y alloy

In this article, the canned forging pancake was successfully gained, and the effects of heat treatment on microstructures and mechanical properties of as-forged Ti-45Al-5Nb-0.3Y have been studied. Three different microstructures, duplex (DP), nearly lamellar (NL) and fully lamellar (FL), have been obtained through different heat treatments, respectively. And the microstructure evolution was also analyzed. The room temperature tensile properties of the as-forged alloy depend on heat treatment. After treated at the condition of 1320 °C for 30 min, the room temperature elongation of the alloy increased obviously. And the as-forged sample treated at 1370 °C for 15 min, with FL structure, exhibited higher room temperature ultimate tensile strength (715.1 MPa) than the samples treated by other conditions.