Residual stresses and surface roughness in turning

The fatigue resistance of components is greatly influenced by their surface integrity. In particular, residual stresses and surface roughness are held to be the primary factors influencing fatigue resistance. This paper prese nts an experimental study of steels were machined by turning, the results o f variations in four process parameters the influence of turning parameters on surface roughness and residual stresses. Two were measured and analyzed . These results show that in the typical range of industrial machining cond itions both surface finish and residual stresses are influenced mainly by t he feed rate and the nose radius; the cutting velocity and the primary rake angle play a minor. negligible role. Moreover, two empirical models were i dentified that can be used to predict residual stresses and roughness as a function of the two major. turning parameters. These models can be used to optimize the turning conditions of components when their functionality requ ires the control of residual stresses and surface roughness.