Stabilities of Microstructure and Mechanical Properties during Long-Term Aging on FGH95 Superalloy

Xu Qing Wang; Guo Jun Ma; Zi Chao Peng

doi:10.4028/www.scientific.net/MSF.898.523

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HomeMaterials Science ForumMaterials Science Forum Vol. 898Stabilities of Microstructure and Mechanical...

Stabilities of Microstructure and Mechanical Properties during Long-Term Aging on FGH95 Superalloy

Abstract:

Thermal stabilities of microstructure and mechanical properties during long-term aging of 550°C/1500h, 650°C/1500h and 700°C/500h have been investigated on superalloy FGH95, in order to characterize the long-term properties of this alloy on service temperature. The results showed that the secondary and tertiary gamma-prime maintained good thermal stability at 550°C and 650°C with aging time up to 1500h. However, during 700°C aging for 500h, the secondary and tertiary γ′ both grew obviously, besides, the shape of secondary γ′ has turned from circular to square. The hardness, high-temperature tensile and creep residual strain had good stability at 550°C and 650°C with aging time up to 1500h. However, the creep residual strain apparently increased when the alloy aged at 700°C for 500h, which means that the FGH95 is suitable to be used for long time below 650°C, and short time at 700°C.

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Periodical:

Materials Science Forum (Volume 898)

Pages:

523-527

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.898.523

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Online since:

June 2017

Authors:

Xu Qing Wang*, Guo Jun Ma, Zi Chao Peng

Keywords:

FGH95 Superalloy, Long-Term Aging, Stability

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