Effect of Annealing Temperature on Microstructure and Mechanical Properties of TA10 Titanium Alloy
TA10 titanium alloy was selected as the research material,and different annealing temperatures were set for annealing treatment of TA10 titanium alloy.Then,the effects of annealing temperature on the microstructure and mechanical properties of TA10 titanium alloy were studied by means of optical microscope,scanning electron microscope and tensile property test at room temperature.The results show that when the annealing temperature is in the two-phase region,the microstructure is composed of primary α phase and β-transformed microstructure.The β-transformed microstructure contains secondary α phase and residual β phase.After the annealing temperature reaches the single-phase region,the microstructure is dominated by coarse β grains and trident grain boundaries appear.With the increase of annealing temperature,the strength of the alloy increases,while the plasticity decreases.It is found that the plasticity of equiaxed structure is the best,the strength of fine lamellar β transformation structure is the largest,and the bimodal structure has excellent comprehensive mechanical properties.When the annealing temperature is in the two-phase region,the tensile fracture microstructure is mainly composed of a large number of equiaxed dimples,including secondary cracks and tearing edges.When the annealing temperature reaches the single-phase region,the fracture morphology is mainly crystalline rock morphology.
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