Effect of solution temperature on cryogenic mechanical properties of A286 alloy

doi:10.13251/j.issn.0254-6051.2023.03.016

Abstract

Abstract: Mechanical properties at low temperatures (-50, -196, -269 ℃) of the A286 alloy after solution treatment at 900, 950 and 1000 ℃ for 1 h, water cooling and aging at 720 ℃ for 16 h, air cooling were studied by means of electronic universal testing machine, metallographic microscope, impact testing machine and electron probe. The results show that at the same test temperature, with the increase of solution treatment temperature, the tensile strength and yield strength change a little, the elongation after fracture is 33%-42%, and the percentage reduction of area is 45%-52%. At the same solution treatment temperature, with the decrease of test temperature, both the tensile strength and the yield strength increase, and the impact absorbed energy decreases, the minimum impact absorbed energy is 45 J, but the good toughness is still maintained.

Key words: A286 alloy, solution treatment, aging, cryogenic mechanical properties

CLC Number:

Dai Libin, Yang Zhangcheng, Deng Xiong, Qiu Shijia, Zheng Chaoqing. Effect of solution temperature on cryogenic mechanical properties of A286 alloy[J]. Heat Treatment of Metals, 2023, 48(3): 96-99.

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