Effect of Heat Treatment on Microstructure and Mechanical Properties of TA15 Titanium Alloy Sheets
In this study,cold-worked TA15 titanium alloy sheets were heat-treated at four temperatures:750℃,800℃,850℃,and 900℃,and the microstructure,room temperature tensile properties,bending properties,Rockwell hardness,and high-temperature performance after treatment were explored in depth.The results showed that at 750℃,the cross-section of the sheet exhibited an equiaxial structure,while the longitudinal section contained a small amount of elongated structure;however,within the temperature range of 800℃to 900℃,both the cross-section and longitudinal section of the sheet formed a uniform and fine equiaxial structure.As the heat treatment temperature increased from 750℃to 850℃,the tensile strength of the sheet gradually decreased,while the elongation and bending angle increased,and the Rockwell hardness gradually decreased.It's worth noting that the sheets heat-treated at 800℃to 850℃exhibited excellent overall performance,especially those heat-treated at 850℃which had completely recrystallized.Therefore,it is recommended that TA15 titanium alloy cold-rolled sheets be heat-treated within this temperature range to achieve the best microstructure and mechanical properties.
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