Abstract
This paper investigates the residual stresses induced by a longitudinal turning operation in 15-5PH martensitic stainless steel. An experimental investigation has quantified the sensitivity of residual stresses to cutting speed, feed, tool geometry and tool flank wear. In parallel, a 3D hybrid model, previously developed, has been applied to each case study. This modelling approach consists of replacing tooling and chipping by equivalent thermal and mechanical loadings. These equivalent loadings are moved onto the machined surface to compute the final residual stress state. It has shown that tool geometry and tool flank wear have a dominant effect on residual stresses compared to cutting speed and feed rate. However, cutting speed influences the intensity of the compressive peak, to some extent, whereas feed influences the affected depth. This work has also shown that the 3D hybrid model is able to predict residual stresses, as well as the sensitivity to cutting parameters, with reasonable agreement.
Highlights
Mechanical industries have to improve the fatigue life of their safety engineering components
Turning, a cutting tool has to make several revolutions around the part. It is that surfaces generated by a large number of revolutions, and not to 2D models.obvious the tool relaxes parttool of has the to residual stress state induced during the previous revolutions, turning, a cutting make several revolutions around the part
Cutting tool geometry and cutting tool flank wear, a reference case study corresponding to the investigated industrial case study has been considered
Summary
Mechanical industries have to improve the fatigue life of their safety engineering components. Interest from industry relates to the 3D turning, a cutting tool has to make several revolutions around the part It is that surfaces generated by a large number of revolutions, and not to 2D models.obvious the tool relaxes parttool of has the to residual stress state induced during the previous revolutions, turning, a cutting make several revolutions around the part. Generation by removing the chip formation it with equivalent thermomeAn alternative approach, proposed byand [23],replacing consists of modelling the residual stress chanical loadings (Figure 1). After several revolutions (enabling a 3D steady state), this model makes the prediction of 3D residual stress fields possible (Figure 2). The paperpaper starts relates by presenting the experimental study, thenThe the numerical model of is invesintrostudy of cutting speed, feed rate, cutting tool geometry and cutting tool flank wear. The longitudinal turning ing operations performed on a 15-5PH (i.e., X5CrNiCu15-5)
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