选取TA10 钛合金作为研究材料,设置不同退火温度对TA10 钛合金进行退火处理,随后使用光学显微镜、扫描电子显微镜、室温拉伸性能测试等手段,研究退火温度对TA10 钛合金组织与力学性能的影响.结果表明:当退火温度为两相区时,组织由初生α相以及β转变组织构成,β转变组织中包含次生α相与残余β相.退火温度达到单相区后,组织以粗大β晶粒为主,并出现三叉状晶界.随着退火温度的升高,合金强度随之升高,而塑性性能随之降低,发现等轴组织塑性性能最佳,细片层β转变组织强度最大,双态组织具有优异的综合力学性能.当退火温度位于两相区时,拉伸断口微观主要由大量等轴状韧窝组成,同时包含二次裂纹与撕裂棱,当退火温度达到单相区后,断口形貌以结晶状岩石形貌为主.
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.