Study on microstructure and high temperature tensile properties of solution aging state TC11 titanium alloy
Taking TC11 titanium alloy as the research material,the alloy was treated by solid solution and aging,and the tensile test was carried out at 400 ℃ to study the microstructure and high temperature tensile properties of the solid solution and aging TC11 titanium alloy.The results show that the microstructure of the alloy is mainly com-posed of primary α phase with long strip and equiaxed shape and secondary α phase with needle shape after solid so-lution treatment in two-phase region.The content of primary α phase decreases and disappears,while the content of secondary α phase increases continuously when the solid solution temperature increases to the temperature of single-phase region.As the solution temperature increases,the tensile strength and yield strength of the alloy also in-crease,and the tensile strength increases from 545 Mpa to 610 Mpa.The yield strength increased from 440 Mpa to 510 Mpa.However,the elongation and cross-section shrinkage gradually decreased,and the elongation decreased from 35％to 18％.The reduction of area decreased from 55％to 37％.Compared with the tensile fracture morphol-ogy at room temperature,the dimple size in the tensile fracture at high temperature is significantly larger and the depth is deeper.
TC11 titanium alloymicrostructurehigh temperature tensile propertiesfracture morphology
万方数据
维普
