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Creep Deformation Behavior of a Novel Precipitate-Hardened Ni-Fe-Base Superalloy at 750 °C

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Abstract

The creep deformation behavior of a novel precipitate-hardened Ni-Fe-base superalloy in solutionized and aged states is investigated at 750 °C/80 to 120 MPa. We found that as creep deformation proceeds, creep curves of specimens in the two states either overlap or are parallel to each other. This study provides a new strategy to design the heat treatment scheme to achieve a good compromise between the strength and fabricability of superalloys for 700 °C-class advanced ultra-supercritical power plants.

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This work was financially supported by China Postdoctoral Science Foundation (Grant Number 2017M623213), Postdoctoral Science Foundation of Shaanxi Province of China (Grant Numbers 2018BSHQYXMZZ32, 2017BSHQYXMZZ08), and the Science & Technology Foundation of Huaneng Group Co, Ltd. (Grant Numbers HNKJ18-H12, ZD-18-HKR01).

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Authors and Affiliations

  1. Xi’an Thermal Power Research Institute Co., Ltd, 136 Xingqing Road, Xi’an, 710032, China

    P. Zhang, Y. Yuan, Y. F. Gu, Y. Y. Dang, J. B. Yan & J. T. Lu

  2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710072, China

    P. Zhang & J. C. Wang

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  1. P. Zhang
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  2. Y. Yuan
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  3. Y. F. Gu
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  4. Y. Y. Dang
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  5. J. B. Yan
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  6. J. T. Lu
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  7. J. C. Wang
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Correspondence to P. Zhang or Y. F. Gu.

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Manuscript submitted August 5, 2019.

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Zhang, P., Yuan, Y., Gu, Y.F. et al. Creep Deformation Behavior of a Novel Precipitate-Hardened Ni-Fe-Base Superalloy at 750 °C. Metall Mater Trans A 51, 1062–1066 (2020). https://doi.org/10.1007/s11661-019-05611-4

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