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| Viscoplastic constitutive model of a nickel-based superalloy under multiaxial loading conditions |
| Wen-bin Jia1, Xin Li1, Zhi Chen1, Kai Zhao1, Lei Fang1 |
| 1 Key Laboratory of Aero-Engine Thermal Environment and Structure, Ministry of Industry and Information Technology, Jiangsu Province Key Laboratory of Aerospace Power System, State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China |
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Abstract Based on Chaboche constitutive model, a viscoplastic constitutive model of nickel-based alloy under multiaxial loading is proposed by introducing Lemaitre damage model and non-proportional hardening factor. Lemaitre damage model can characterize the effect of microscopic defects on the fatigue behavior and non-proportional hardening factor is used to describe non-proportional hardening phenomenon. Subsequently, the stress–strain hysteresis loops at room and high temperatures under different loading conditions are simulated by the proposed constitutive model. Comparison between experiments and simulations confirms that the proposed model can reasonably predict the fatigue behavior of nickel-based alloy under different multiaxial loadings. At last, the fatigue life predictions under different multiaxial loadings are investigated, and comparison between experiments and simulations verifies the accuracy of the proposed model.
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| Cite this article: |
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Wen-bin Jia,Xin Li,Zhi Chen, et al. Viscoplastic constitutive model of a nickel-based superalloy under multiaxial loading conditions[J]. Journal of Iron and Steel Research International, 2021, 28(9): 1190-1202.
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2021, Vol. 28 
