Influence of lubrication mode onto residual stress generation in turning

Residual stresses in the surface layer have a significant impact on the fatigue resistance of machined surfaces. This paper investigates the influence of lubrication mode (flood cooling ⇔ micro quantity lubrication) and of cutting fluid composition (emulsion ⇔ vegetable oil) on the generation of residual stresses in finish turning. First an experimental campaign quantifies the sensitivity of both parameters when turning an austenitic stainless steel 316L, then a numerical model provides some physical explanations on the results. It is shown that the application of a cutting fluid for this application does not influence significantly the residual stress generation.