Comparison of Residual Stresses in Cryogenic and Dry Machining of Inconel 718

This paper focuses on the analysis of residual stress differences between cryogenic and dry machining of Inconel 718. A novel method for calculating the residual stress differences is proposed based on the assumption that the elastic-plastic deformations for cryogenic and dry machining of Inconel 718 are the same. The residual stress differences depend only on the temperature differences at the start of material elastic unloading which can be obtained by finite element analysis. For validation, a series of cryogenic and dry turning experiments have been conducted and the residual stresses are measured.