Table of Contents
Journal of Powder Technology
Volume 2014, Article ID 368721, 7 pages
http://dx.doi.org/10.1155/2014/368721
Research Article

Workability Behaviour of Powder Metallurgy Aluminium Composites

School of Engineering and Physics, Faculty of Science, Technology and Environment, The University of the South Pacific, Laucala Campus, Private Mail Bag, Suva, Fiji

Received 23 April 2014; Accepted 17 June 2014; Published 1 July 2014

Academic Editor: Thierry Barriere

Copyright © 2014 S. Narayan and A. Rajeshkannan. 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

An efficient way to find the workability limit for powder metallurgy parts has been suggested. Compacts of Al-4%TiC, Al-4%WC, Al-4%Fe3C, and Al-4%Mo2C were produced to the relative density of 0.82 and 0.86 with three different geometries through primary operations of powder metallurgy routes. Each sintered compact was hot deformed to various strain levels till a visible crack appeared at the free surface. Oyane’s fracture principle was used to develop a theory to study powder metallurgy compacts. A least square technique was used to determine the constants in fracture criteria and these equations were finally used to find workability limit. It is found that the projected technique was well in agreement with the experimental values.