Effects of compression and aging on microstructure and properties of A286 superalloy

doi:10.13251/j.issn.0254-6051.2022.11.018

Abstract

Abstract: A286 alloy after solution treatment at 980 ℃ for 2 h was subjected to compression and aging treatment, and the element composition of the phase was observed by means of X-ray diffraction (XRD). Microstructure was observed by means of metallographic microscope (OM) and scanning electron microscope (SEM). Vickers hardness was measured by hardness tester, and the properties were compared to verify the effect of precipitation on properties of A286 alloy after aging. The results show that under the same compression conditions, with the increase of aging time, the number of precipitates increases, and the precipitates are mainly γ′ phase, TiC and chromium carbide. Under the same aging conditions, with the increase of deformation, the number of precipitates also increases. When aged at 680 ℃, with the increase of aging time, the hardness of the alloy with same deformation shows an increasing trend, but the increasing rate gradually slows down. The hardness of the alloy with compression of 35% reaches the peak value when aged at 720 ℃ for 8 h.

Key words: A286 superalloy, compression, aging, precipitated phase, hardness

CLC Number:

TG142

Zhang Xiaobin, Zhang Cuiyu, Wei Liangliang, Wang Lili, Yu Maosong, Ding Yanhong, Ma Xu. Effects of compression and aging on microstructure and properties of A286 superalloy[J]. Heat Treatment of Metals, 2022, 47(11): 106-110.

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