Table of Contents
Indian Journal of Materials Science
Volume 2015, Article ID 756219, 10 pages
http://dx.doi.org/10.1155/2015/756219
Research Article

Effect of MgFeSi Inoculant on Properties of Cast 6061 Al Alloy for Brake Master Piston Application

1Metallurgical and Materials Engineering Department, Federal University of Technology Akure, Akure 340252, Nigeria
2Materials and Metallurgical Engineering Department, Federal University Oye Ekiti, Oye Ekiti 371104, Nigeria

Received 13 May 2015; Revised 2 September 2015; Accepted 15 September 2015

Academic Editor: Kwo Young

Copyright © 2015 Olawale Olarewaju Ajibola and Daniel Toyin Oloruntoba. 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

The influence of varying amount of MgFeSi inoculant on properties of cast 6061 Al alloy for brake master piston application has been studied and reported in this paper. Cast samples were produced at three pouring temperatures (700, 750, and 800°C) with MgFeSi varied from 1 to 3%. Wear resistance tests were performed on cast alloy in brake oil. Wear resistance tests results were validated by nondestructive examinations using photomicroscopy, SEM, EDX, and XRD data. The addition of MgFeSi influenced both the mechanical (hardness, strength, and wear resistance) and metallurgical properties (microstructures) of the cast alloy. Al grains were more refined and yielded good strength properties. Inoculating the melt with MgFeSi forms insoluble compound particles and is responsible for grain refinement. The increased amount of MgFeSi from 1 to 3% improved the wear resistance of the cast piston under lubricating condition using brake oil.