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International audienceMinimum Quantity Lubrication (MQL) is a lubrication method in machining field. It consists in spraying very small amount of oil to the cutting edge with compressed air. This technique decreases friction between chip and the cutting face of the tool which leads to better surface finish and tool life. Well-chosen oil will give best results on surface integrity. Regarding the choice of oil, this paper aims to identify the evolution of tool temperature, tool wear, surface roughness and cutting forces in milling process. The influence of two oils (synthetic ester and fatty alcohol) is investigated and compared with dry machining

The main difficulty presented by the simulation of a global process that includes different forming stages is the correct characterization of the material state at the end of each of these stages, which in turn, are the initial point of the following process. Hardening variables are capable of characterizing the state of the material, which, after a plastic transformation, varies according to the direction of the solicitation and its intensity. The present work carries out an analysis of the influence in the election of the hardening rule used in the behavior law, comparing the most used approach. For a work piece solicited by combined efforts in multiple stages, results are obtained by numerical simulation. A correct choice will allow obtaining reliable predictions, not the solicitations but also to the final geometry and the dissipated energy in the global process, allowing an eventual optimization of such process.