Study on the microstructure and tensile properties of solid solution TC11 titanium alloy
Taking TC11 titanium alloy as the experimental material,the microstructure and tensile properties of the alloy were studied by a series of solid solution treatments at different temperatures.The results show that the num-ber of primaryαphase decreases with the increase of solid solution temperature,and its content decreases signifi-cantly when the solid solution temperature is close to the phase transition point.It is also found that the primaryα phase disappears completely from the structure after the solid solution temperature exceeds the phase transition point.The increase of solution temperature helps to strengthen the tensile strength and tensile yield strength of the alloy,but the plastic properties of the alloy will continue to decrease during this process.When the solution temper-ature is low,the surface of the tensile fracture is uneven,the number of dimples in the fracture is large,and the size of the dimples is large and the depth is obvious.When the solution temperature is high,the number and size of dim-ples on the surface of the tensile fracture are significantly reduced.The fracture is mainly characterized by river-like patterns and cleavage steps,and secondary cracks and tearing edges also appear.