Affiliation:
1. School of Engineering of São Carlos, University of São Paulo, São Carlos, Brazil
Abstract
The machinability of titanium and its alloys is generally considered as poor owing to characteristics such as low thermal conductivity, high strength at high temperatures, and low Young's modulus. In order to determine the behaviour of Ti and Ti-6Al-4V alloy, several samples were face diamond turned on an ultra-precision lathe (10 nm resolution). A mist of cutting fluid was used. The characterization techniques used were: scanning electron microscopy, optical microscopy, and contact and non-contact profilometry. The surface damage observed owing to interaction between tool and workpiece was associated with a phenomenon known as ‘delamination’. The smallest values of roughness were 590 nm Rt for Ti and 416nm Rt for Ti-6Al-4V under the same conditions. The results showed that the ultra-precision diamond turning is a viable option for the finish of Ti and Ti-6Al-4V.
Subject
Industrial and Manufacturing Engineering,Mechanical Engineering
Cited by
28 articles.
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