Characteristics of wire-electro discharge machined Ti6Al4V surface

Abstract Titanium and titanium alloys (e.g., Ti6Al4V) are increasingly used in aerospace and automotive industries, and also used as medical implant material in wide variety of applications. Wire-electro discharge machining (WEDM) is an important non-traditional machining process, widely used for machining a variety of difficult-to-machine materials including titanium alloys with intricate shapes. The process is essentially a thermal process and the nature of surface produced is studied in this paper. It is observed that more uniform surface characteristics are obtained with coated wire electrode. Among the parameters such as time between two pulses, pulse duration, injection pressure, wire speed and wire tension that have more influence on the surface characteristics, the time between two pulses is the most sensitive parameter.

[1]  Shane Y. Hong,et al.  New cooling approach and tool life improvement in cryogenic machining of titanium alloy Ti-6Al-4V , 2001 .

[2]  Y. S. Tarng,et al.  Determination of optimal cutting parameters in wire electrical discharge machining , 1995 .

[3]  G. N. Mathur,et al.  Oxidation behaviour of Ti6Al4V titanium alloy in oxygen , 2002 .

[4]  J. McGeough.  Advanced Methods Of Machining , 1988 .

[5]  Yunn-Shiuan Liao,et al.  Determination of finish-cutting operation number and machining-parameters setting in wire electrical discharge machining , 1999 .

[6]  W. Ensinger,et al.  Formation of titanium oxide films on titanium and Ti6Al4V by O2-plasma immersion ion implantation , 2000 .

[7]  S. Shabalovskaya,et al.  Surface, corrosion and biocompatibility aspects of Nitinol as an implant material. , 2002, Bio-medical materials and engineering.

[8]  A. Gogia,et al.  Development of oxidation resistant coatings for titanium alloys , 2001 .

[9]  M. Härting,et al.  Determination of the residual stress state in a natural titanium oxide layer , 1996 .

[10]  Kamlakar P Rajurkar,et al.  Analysis and optimization of parameter combinations in wire electrical discharge machining , 1991 .

[11]  T. R. Bement,et al.  Taguchi techniques for quality engineering , 1995 .

[12]  G. Byrne,et al.  Observations on chip formation and acoustic emission in machining Ti–6Al–4V alloy , 2001 .

[13]  B. Cullity,et al.  Elements of X-ray diffraction , 1957 .

[14]  L. Munuera,et al.  In vitro corrosion behaviour and osteoblast response of thermally oxidised Ti6Al4V alloy. , 2003, Biomaterials.