Effect of double aging treatment on microstructure and properties of β21S titanium alloy bar

doi:10.13251/j.issn.0254-6051.2022.10.033

Abstract

Abstract: Microstructure and properties of the β21S titanium alloy bar after double aging treatment were studied. The results show that the α phase occurs in the grain after first aging, and the temperature and time of the first aging treatment have a great influence on precipitated phase. After the first aging at 540 ℃ for 20 min and 550 ℃ for 10 min, relatively uniform and comparable amounts of precipitates can be obtained. After first aging and then second conventional aging at 510 ℃, the tensile strength of the specimen does not decrease significantly, but the elongation of the specimen increases more than 2% compared with the single solution aging. Under the same double aging treatment, as the solution temperature increasess, the tensile strength increases, while the elongation decreases. Double aging treatment has little effect on shear properties.

Key words: β21S titanium alloy, double aging, microstructure, properties

CLC Number:

TG146.23

Wang Xingyun, Huang Wenbin, Qiao Enli, Lei Wenguang, Yue Xu. Effect of double aging treatment on microstructure and properties of β21S titanium alloy bar[J]. Heat Treatment of Metals, 2022, 47(10): 198-202.

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