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Cutting mechanism of enhanced phase γ' in Inconel 718 based on strain gradient theory

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Abstract

Inconel 718 is one kind of nickel-based superalloy containing γ′ precipitates (Ni3Al). It has been widely used in aerospace field due to its high strength, high oxidation resistance, and corrosion resistance at high temperature. Considering the influence of the strengthening phase γ′ on the cutting deformation, and the inability of traditional classical mechanics to describe the characteristic scale of materials and to accurately explain some phenomena in the machining process, the model of enhanced phase γ′ with cohesive element in cutting Inconel 718 is established in this paper. Moreover, the strain gradient theory is introduced to establish constitutive model. The effects of γ′ phase on stress, strain, and temperature and the distribution of stress field at the crack tip are analyzed from the point of view of material micro-plasticity mechanics and material dislocation theory. The strain gradient strengthening effect is studied by changing the size of γ′ phase.

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Funding

The work is support by the Natural Science Foundation of Jilin Province (20200201064JC) and National Natural Science Foundation of China (51605043).

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Authors and Affiliations

  1. School of Mechatronic Engineering, ChangChun University of Technology, ChangChun, 130012, China

    ZhaoPeng Hao, JiNing Li & YiHang Fan

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  1. ZhaoPeng Hao
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  2. JiNing Li
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Contributions

Z.P. Hao and J.N. Li conceived the research.

J.N. Li performed the calculations and wrote original draft.

Y.H. Fan completed the experiments and analyzed the data.

All authors discussed and commented on the manuscript.

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Correspondence to YiHang Fan.

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Hao, Z., Li, J. & Fan, Y. Cutting mechanism of enhanced phase γ' in Inconel 718 based on strain gradient theory. Int J Adv Manuf Technol 113, 2523–2537 (2021). https://doi.org/10.1007/s00170-021-06821-0

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