Table of Contents
Journal of Metallurgy
Volume 2016 (2016), Article ID 7407918, 10 pages
http://dx.doi.org/10.1155/2016/7407918
Research Article

Metallurgical and Machinability Characteristics of Wrought and Selective Laser Melted Ti-6Al-4V

School of Engineering, Faculty of Science, Engineering and Built Environment, Deakin University, Waurn Ponds, Geelong, VIC, Australia

Received 13 June 2016; Revised 16 September 2016; Accepted 18 September 2016

Academic Editor: Sunghak Lee

Copyright © 2016 Manikandakumar Shunmugavel et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This research work presents a machinability study between wrought grade titanium and selective laser melted (SLM) titanium Ti-6Al-4V in a face turning operation, machined at cutting speeds between 60 and 180 m/min. Machinability characteristics such as tool wear, cutting forces, and machined surface quality were investigated. Coating delamination, adhesion, abrasion, attrition, and chipping wear mechanisms were dominant during machining of SLM Ti-6Al-4V. Maximum flank wear was found higher in machining SLM Ti-6Al-4V compared to wrought Ti-6Al-4V at all speeds. It was also found that high machining speeds lead to catastrophic failure of the cutting tool during machining of SLM Ti-6Al-4V. Cutting force was higher in machining SLM Ti-6Al-4V as compared to wrought Ti-6Al-4V for all cutting speeds due to its higher strength and hardness. Surface finish improved with the cutting speed despite the high tool wear observed at high machining speeds. Overall, machinability of SLM Ti-6Al-4V was found poor as compared to the wrought alloy.