Influence of Sintering Temperature on the Microstructure and Tensile Properties of Ti_2AlNb Prepared by SPS AITranslate

7白家元,杨家典,瞿兆银,牟旭祥.Fe元素对TC4钛合金显微组织和力学性能的影响[J].金属加工（热加工）,2024(7):94-98.

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Chinese Library Classification Number:TG146.23[金属学及工艺—金属材料]

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Ti_2AlNb alloy was prepared by high-energy ball milling and spark plasma sintering technology.The microstructure and phase composition of the alloy were characterized by SEM,EDS and XRD,the tensile strength of the alloy at room temperature was measured by universal tensile testing machine,and the fracture morphology was observed.The effects of different sintering temperatures on the microstructure and tensile properties of Ti_2AlNb alloy were analyzed.The results show that Ti_2AlNb alloy is composed of O phase,B2 phase and α₂ phase at different sintering temperatures,and the morphology of the O phase changes with the sintering temperature.The O phase appears as Rim-O phase at 950 ℃,acicular O phase at 1 000 ℃,and lath-like O phase at 1 050 ℃ and 1 100 ℃.The tensile strength of Ti_2AlNb alloy at room temperature can reach 198 MPa under the conditions of a sintering temperature of 1 000 ℃,a holding time of 90 min and a pressure of 50 MPa,and its fracture type after tensile testing at room temperature is brittle fracture which mainly consists of cleavage fracture.