Effect of Long-Term Aging on Microstructure and Mechanical Properties of a Wrought Ni-Base Superalloy

Chao Yuan; Huan Wang; Jian Ting Guo; He Yong Qin

doi:10.4028/www.scientific.net/MSF.816.546

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HomeMaterials Science ForumMaterials Science Forum Vol. 816Effect of Long-Term Aging on Microstructure and...

Effect of Long-Term Aging on Microstructure and Mechanical Properties of a Wrought Ni-Base Superalloy

Abstract:

During long-term and high temperature service, microstructures of superalloys may change and then have an adverse impact on mechanical properties, so the stabilities of a wrought Ni-base superalloy aging without stress at 650°C were investigated in this paper. The results showed that the size and morphology of γ' precipitates in the alloy were not obviously influenced with the increase of exposure time, and primary MC carbides present excellent thermal stability. Moreover, almost no detrimental phase was found. Tensile strength and plasticity at room temperature after aging remained steady. Under the condition of 650°C/823MPa, the stress ruptures life presented increasing trend overall and plasticity decreases slightly. In conclusion, the experiment alloy presents a good thermal stability at 650°C.

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Periodical:

Materials Science Forum (Volume 816)

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546-550

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.816.546

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Online since:

April 2015

Authors:

Chao Yuan*, Huan Wang, Jian Ting Guo, He Yong Qin

Keywords:

Long-Term Aging, Mechanical Properties, Microstructure, Wrought Ni-Base Superalloy

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