Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Tribological studies of EDM modified titanium surfaces
Submission Author:
Bruna Michelle de Freitas , PR
Co-Authors:
Carlos augusto Henning Laurindo, fred lacerda amorim, Paulo Soares, Bruna Michelle de Freitas
Presenter: Bruna Michelle de Freitas
doi://10.26678/ABCM.COBEM2017.COB17-2467
Abstract
Titanium alloys are the most used metallic materials for biomedical applications for hard tissue replacement due to their excellent mechanical properties, biocompatibility, and good corrosion properties. However, they present poor wear and corrosive wear resistance properties, leading to undesired biological responses by the wear debris and ionic dissolution of the metal. The Electrical Discharge Machining (EDM) is a non-conventional manufacturing technique, which promotes material removal by electric discharges. During the EDM process, the sample surface is submitted to metallurgical modifications by the cast and recast of a thin layer over the machined surface. The objective of this work is to evaluate the influence of the parameters in the EDM process on the mechanical properties of the Ti6Al4V alloy. Ti6Al4V samples were machined in a sinking EDM machine, using finishing machining parameters. Graphite round bars (25.4 mm diameter and grain size of 10 µm) were used as an electrode and hydrocarbon fluid, deionized water containing glycerin and hydrocarbon fluid containing silicon powder as the dielectric solution. Surface properties were evaluated by scanning electron microscopy (SEM/EDS) and glancing angle X-ray diffraction (GA-XRD). Results show that the formation of a recast layer composed of titanium carbide (TiC) increases the hardness and the wear resistance of titanium alloy.
Keywords
titanium, Surface modification, EDM, Mechanical Properties, Wear
