A physically based methodology for predicting anisotropic creep properties of Ni-based superalloys
Author(s): Jia Huang, Duo-Qi Shi, Xiao-Guang Yang, School of Energy and Power Engineering, Beihang University
Pages: 606-614
Year: 2016 Issue: 8
Journal: Rare Metals
Keyword: Wilshire equations; Anisotropic creep properties; Ni-based superalloy; Prediction methodology; Creep mechanism;
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.
Pages: 606-614
Year: 2016 Issue: 8
Journal: Rare Metals
Keyword: Wilshire equations; Anisotropic creep properties; Ni-based superalloy; Prediction methodology; Creep mechanism;
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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