Effect of cutting parameters on the depth of subsurface deformed layers of single gamma-TiAl alloy during nano-cutting process

JY Li and YX Sun and HC Xie and WH Zhao and CY Xu and JH Liu, APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 128, 189 (2022).

DOI: 10.1007/s00339-022-05297-3

In order to investigate the effect of cutting parameters on the depth of the subsurface deformed (SSD) layers of the workpiece, a diamond nano- cutting single crystal gamma-TiAl alloy model is established by means of molecular dynamics (MD). Common neighbor analysis (CNA) method is adopted to identify the defect structure in the workpiece. The distribution and evolution of the defect structure in the workpiece are interviewed. The depth of SSD layers is utilized to determine the deformation degree of workpiece, and the effect of cutting distance and cutting speed on the depth of SSD layers of the workpiece are statistically studied. The results indicate that during nano-cutting process, with the progress of nano-cutting, some relatively stable defect structures remain in the subsurface of the workpiece, forming the SSD layers. In nano-cutting process, the depth of the SSD layers of changes continuously with the cutting distance. When the cutting distance reaches 10 nm, the depth of the SSD layers remains basically unchanged. Increasing cutting speed has little effect on subsurface deformation.

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