Effect of Annealing Treatment on Microstructure and Fracture Toughness of TC11 Titanium Alloy AITranslate

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Chinese Library Classification Number:TG156.2[金属学及工艺]

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TC11 titanium alloy was selected as the test material,the effects of annealing temperature on the microstructure,crystal structure and fracture properties of TC11 titanium alloy were studied.The results show that with the increase of annealing temperature,the microstructure type of the alloy changes from bimodal structure to fine lamellarβtransformation structure,the fracture toughness increases continuous-ly,the number of dimples in the fracture morphology decreases continuously,and finally a brittle fracture morphology with rock-like characteristics is formed.When the annealing temperature is in the two-phase region,the{0001}crystal plane of the alloy shows a mixed texture of B-type and near-T-type.When the annealing temperature is in the single-phase region,the{0001}crystal plane of the alloy mainly exhibits T-type texture.With the increase of annealing temperature,the texture intensity increases continuously,but only the characteristic diffraction peaks ofαphase exist in the XRD patterns,and no diffraction peaks ofβphase or other phases are found.