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.
关键词
TC11钛合金/微观组织/高温拉伸性能/断口形貌
Key words
TC11 titanium alloy/microstructure/high temperature tensile properties/fracture morphology
维普
万方数据