Investigation on the Micromilling of Titanium alloys Ti6Al4V

Abstract

Micro-milling is the most emerging machining process nowadays. Because it just not possibly makes the two-dimensional and three-dimensional shapes of material but it can also manufacture various types of engineering materials. In industries the use of microlevel parts is increasing very rapidly so that is why micro machining is most needed machining type. Micro milling is mostly used micro machining type because of its accuracy in machining, greater surface finish and it can also give greater material removal rate. Other than that this process is preferably good because of its process flexibility in machining of miniature parts. While in selection of workpiece material this process also has no limitations. This study is intended to focus on the micromachining of aerospace material alloys. Mostly used materials are titanium alloys and nickel based super alloys. Widely used aerospace material is titanium alloy of Ti6Al4V as it has greater strength to weight ratio, good corrosion resistance and it is good for high temperature application. But titanium alloys are is very difficult to machine due to their lower elongation to break ratio and very poor thermal conduction. Micro level of machining becomes more difficult. Although it gives greater accuracy but some difficulties becomes more prominent at this level. There are many problems during this machining process which are needed to be covered. These are the burr formation and surface finish of workpiece and most importantly tool life which means focus on its wear. In these problems our center of attention is the burr formation and surface roughness of workpiece. In this research to analysis percentage contribution of parameters effecting the surface quality, the statistical analysis method ANOVA is used.