Research of plastic behavior in high-speed cutting Inconel718 based on multi-scale simulation

• Published in: International journal of advanced manufacturing technology Vol. 94; no. 9-12; pp. 3731 - 3739
• Main Authors: Fan, YiHang, Wang, Tao, Hao, ZhaoPeng, Ji, FangFang
• Format: Journal Article
• Language: English
• Published: London Springer London 01.02.2018; Springer Nature B.V
• Subjects: Alloying elements; Brittleness; CAE) and Design; Computer simulation; Computer-Aided Engineering (CAD; Corrosion resistance; Cutting speed; Deformation mechanisms; Dislocations; Engineering; Finite element method; Hardness; High speed machining; High temperature; Industrial and Production Engineering; Mathematical models; Mechanical Engineering; Media Management; Model accuracy; Morphology; Nickel base alloys; Niobium carbide; Original Article; Oxidation resistance; Precipitation hardening; Scale (ratio); Simulation; Superalloys; Brittle phase particle; Inconel718; Multi-scale simulation; Dislocation slip; Serrated chip
• ISSN: 0268-3768; 1433-3015
• DOI: 10.1007/s00170-017-1121-4

The nickel-based alloy Inconel718 is widely used in the field of aerospace because it has a high yield strength, high corrosion resistance, and high-temperature oxidation resistance. These excellent performances were obtained through the precipitation strengthening and since it has the phase of body-centered tetragonal γ ″ and face-centered cubic γ ′ .The alloying elements which make material strengthen exist in the form of high hardness compounds, such as TiC, NbC, and other interphase hard point. These high hardness compounds result in complex cutting deformation of cutting process. In this paper, the multi-scale finite element model of Inconel718 is established and the cohesive element is added into the brittle phase particles to conduct the cutting simulation. The simulation results obtained by the proposed multi-scale simulation model are closer to the experimental results, so as to illustrate the accuracy of the proposed model. On the basis, the action mechanism of the brittle phase on the grain dislocation slip and the effect of brittle phase on the morphology evolution of serrated chip are analyzed.