The Influence of Material Properties on the Tool Crater Wear When Machining Ti6Al4V Produced by Additive Manufacturing Technologies

AbstractIn the biomedical field the Additive Manufacturing (AM) technologies are increasingly being adopted for the production of near-net-shape products made in titanium alloys, however finishing machining operations can be necessary to obtain the required geometrical tolerances and surface characteristics. This paper aims at investigating the effects of the workpiece properties on the tool crater wear behavior in semi-finishing turning of Ti6Al4V produced by Electron Beam Melting (EBM) and Direct Metal Laser Sintering (DMLS) AM technologies in comparison with the one of the wrought commercial alloy. Liquid nitrogen was used as a coolant to reduce the crater wear and its performances compared with dry turning. A correlation is proved between the mechanical and thermal properties of the investigated alloys and the crater wear occurrence