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A physically based methodology for predicting anisotropic creep properties of Ni-based superalloys

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Abstract

This paper is focused on developing suitable methodology for predicting creep characteristics (i.e., the minimum creep strain rate, stress rupture life and time to a specified creep strain) of typical Ni-based directionally solidified (DS) and single-crystal (SC) superalloys. A modern method with high accuracy on simulating wide ranging creep properties was fully validated by a sufficient amount of experimental data, which was then developed to model anisotropic creep characteristics by introducing a simple orientation factor defined by the ultimate tensile strength (UTS). Physical confidence on this methodology is provided by the well-predicted transitions of creep deformation mechanisms. Meanwhile, this method was further adopted to innovatively evaluate the creep properties of different materials from a relative perspective.

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Acknowledgments

This research was financially supported by the National Natural Science Foundation of China (No. 51275023) and the Innovation Foundation of BUAA for Ph.D. Graduates (No. YWF-14-YJSY-49).

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Authors and Affiliations

  1. School of Energy and Power Engineering, Beihang University, Beijing, 100191, China

    Jia Huang, Duo-Qi Shi & Xiao-Guang Yang

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  1. Jia Huang
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  2. Duo-Qi Shi
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  3. Xiao-Guang Yang
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Correspondence to Duo-Qi Shi.

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Huang, J., Shi, DQ. & Yang, XG. A physically based methodology for predicting anisotropic creep properties of Ni-based superalloys. Rare Met. 35, 606–614 (2016). https://doi.org/10.1007/s12598-015-0544-z

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  • DOI: https://doi.org/10.1007/s12598-015-0544-z

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