Effects of different annealing temperatures on microstructure evolution and tensile properties of Ti662 titanium alloy
Ti662 titanium alloy was selected as the research material of this paper,and Ti662 titanium alloy was heated at different temperatures,followed by annealing treatment.The study focused on understanding the influence of varying annealing temperatures on the microstructural characteristics and tensile strength of the Ti662 titanium alloy.The results showed that the examination demonstrated a persistent diminution in the content and volume of the primary α phase within the Ti662 alloy,an observation concurrent with the escalating annealing temperature,while the content and volume of β phase increased continuously.When the temperature reached the single phase re-gion,the trident grain boundary appeared in the structure,and the structure formed β grains,and a large number of secondary α phases were dispersed in the structure.The strength of the alloy is the lowest when the annealing tem-perature is 900 ℃,but the plasticity is the highest.When the annealing temperature is 960 ℃,the strength of the alloy reaches the maximum and the plasticity reaches the minimum.After the alloy is annealed in the two-phase re-gion at low temperature,a large number of equiaxed dimples are evenly distributed in the fracture.When the annea-ling temperature is close to the phase transition point,there are obvious tearing edges in the fracture.When the an-nealing temperature rises to the single-phase region,the fracture morphology changes to a structure similar to crys-talline rock,and it is found that there are obvious secondary crack morphology in the fracture.
NETL
NSTL
万方数据
