Micromilling of Equal Channel Angular Pressing Titanium

International audiencePure titanium is the ideal metallic material to be used for producing dental implants due to its good corrosion resistance and biocompatibility. However, pure titanium does not present high mechanical resistance, which can be a limiting factor. Severe plastic deformation techniques such as equal channel angular pressing (ECAP) can be used to improve its properties by means of grain refinement. This study deals with micromilling of pure titanium powder workpieces consolidated by ECAP. Its machinability is evaluated measuring cutting , surface roughness, top burr height, and chips morphology and it is made a comparison with commercial pure titanium workpieces. The cutting tests are performed for the constant depth of cut and cutting speed, and a range of feed per tooth from 0.5 to 4.0 µm/tooth. Results show no significant differences between ECAP workpieces and commercial alloy considering roughness and burr formation whereas higher forces are found for the ECAP titanium. Both materials produce long chips for smaller feeds