Experiment and Simulation Research on Cryogenic Cutting of Inconel 718

doi:10.3901/JME.2020.18.061

Abstract

Abstract: Cryogenic cutting can effectively solve the problems of high cutting temperature and poor surface quality in the processing of superalloy alloys. Static tensile test and Hopkinson test of Inconel 718 under low temperature conditions are performed to test the low-temperature mechanical properties of the Inconel 718, and a low-temperature constitutive model of the superalloy is constructed. The method of combining single-factor cutting experiment and finite element simulation is used to study the chip morphology, cutting temperature field and stress field of Inconel 718 in cryogenic cutting. The experimental results show that under low temperature conditions, the strength of Inconel 718 increased, and the elongation and plasticity reduced. The modified Johnson-Cook constitutive model can accurately describe the dynamic mechanical properties of Inconel superalloy under low temperature conditions. The cryogenic cutting test show that the low-temperature cooling will lead to an increase of the aliasing degree of the chips. Simulation results show that cryogenic cutting effectively reduces the temperature of the cutting area and improves the stress distribution in the cutting deformation area. Compared with the traditional cutting method, the cryogenic cutting technology has a significant improvement in the machinability of superalloy alloys.

Key words: Inconel 718, cryogenic mechanical properties, constitutive model, cryogenic cutting, simulative analysis

CLC Number:

TG506

LI Jianming, WANG Xiangyu, QIAO Yang, FU Xiuli, GUO Peiquan. Experiment and Simulation Research on Cryogenic Cutting of Inconel 718[J]. Journal of Mechanical Engineering, 2020, 56(18): 61-72.

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