Effects of Heat Treatment on Microstructure and Mechanical Properties of Ti62A Titanium Alloy
Heat treatment is one of the important means to adjust the microstructure and properties of titanium alloy.The Ti62A titanium alloy was tested for heat treatment at 910-940℃/2 h and AC.The mechanical properties of the samples were measured at room temperature and the microstructure was observed.The effects of different heat treatment systems on the microstructure and mechanical properties of Ti62A titanium alloy were studied.The results show that the impact work of Ti62A alloy increases with the increase of heat treatment temperature,and the impact work increases from 26 J to 34 J,the improvement is obvious.The change of tensile strength is small,and the bending strength difference is slightly reduced.After heat treatment at 940℃/2 h,the microstructure of the specimen consists of spherical primary α phase and lamellar secondary phase.This kind of microstructure is beneficial to improve the impact work of the material.Therefore,the strength and impact toughness of the alloy can be well matched after 940℃/2 h,AC heat treatment.
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