On Saw-Tooth Chip Formation in High Speed Cutting GH4169
The nickel-based superalloy GH4169 is a typical difficult-to-cut material, but it has been used in a good many kinds of aeronautical key structures because of its high yield stress and anti-fatigue performance at the temperature below 650°C. In this paper, finite element method (FEM) was introduced to study the saw-tooth chip forming process in detail when machining nickel-based superalloy GH4169. By the way of Lagrangian visco-elastic plastic approach, adiabatic shear band (ASB) was simulated in high speed machining condition by general commercial finite element code, and the mechanism of the adiabatic shearing phenomenon at primary shear zone was analyzed with the help of finite element analysis (FEA). The comprehensive comparisons of saw-tooth chip morphology under a wide range of cutting speed were also presented.
Kai Cheng, Yingxue Yao and Liang Zhou
D. J. Zhang et al., "On Saw-Tooth Chip Formation in High Speed Cutting GH4169", Applied Mechanics and Materials, Vols. 10-12, pp. 359-363, 2008