The study of ultra-precision machining and residual stress for NiP alloy with different cutting speeds and depth of cut

The non-electrolytic NiP alloy is a special material developed to improve t he machinability of nickel for ultra-precision cutting. The application of the coupled thermo-elastic-plastic model in a new cutting material often la cks the flow stress function. To overcome this problem, the data from an un i-axial tension experiment were used in this study to regress the flow stre ss and obtain the stress function. The simulation process achieved through the large deformation finite element method is used to analyze the distribu tion changes of the cutting force, strain and stress of the NiP workpiece u nder different orthogonal cutting conditions. The chip formation, the distr ibution of the temperature field of the workpiece and chip and the residual stress of the workpiece generated after cutting can all be obtained to det ermine the effect of these cutting conditions on the processing of the work piece. (C) 2000 Elsevier Science S.A. All rights reserved.