Effect of Particle Size on Dry Sliding Wear of Cast A356-Al2o3 Metal Matrix Composites

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2014 by IJETT Journal
Volume-12 Number-9
Year of Publication : 2014
Authors : Honnaiah.C , Rakesh B.K , Manjunath B


Honnaiah.C , Rakesh B.K , Manjunath B. "Effect of Particle Size on Dry Sliding Wear of Cast A356-Al2o3 Metal Matrix Composites", International Journal of Engineering Trends and Technology (IJETT), V12(9),438-445 June 2014. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group


Aluminum alloy is the most commonly used matrix for the metal matrix composites. The ceramic particles reinforced aluminum composites are termed as new generation material and these materials can be tailored and engineered with specific required properties for specific application requirements. Among metal-ceramic particle composite, aluminum-graphite, aluminum-alumina and aluminum-silicon carbide particles can posses improved wear resistance, high temperature hardness and strength. In the present study, A356 with 10% Al2O3p of different particle size (23?m, 45?m, 75?m, 120?m) MMC material was fabricated using stir casting (vortex method) method. In the present work an attempt has been made to study the effect of particle size on dry sliding wear of cast A356-Al2O3 metal matrix composites. Dry sliding wear tests were carried out under ambient conditions (24-28 oC) using pin-on-disc wear testing machine. Prior to testing, the specimens were ground against a 600 grit SiC abrasive paper to make the surface flat and maintain the surface finish between 1.5 and 3?m Ra value. The wear test was conducted at different loads, with increments of 10N and varying sliding distance (up to 5000m) at constant velocity of 2 m/s. The results show the composites reinforced with all the four different particle size exhibits significantly higher wear resistance than the matrix alloy due to addition of hard alumina particles which acts as a load bearing constituent. Particle size is one of the important factor which influences wear. It can also be observed from the test result that the composite material with large size particulate reinforcements experience higher order wear compared to those with smaller size particulate reinforcement. And also observed that the wear increases with increasing sliding distance and load.


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A356, Al2O3, Particles, MMC’s