Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 29    No. 10    October 2019

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Tribological behavior of A356-CNT nanocomposites fabricated by various casting techniques
Benyamin ABBASIPOUR1, Behzad NIROUMAND1, Sayed Mahmoud MONIR VAGHEFI1, Mohammad ABEDI2

1. Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran;
2. National University of Science and Technology “MISiS”, Moscow 119049, Russia

Abstract:Tribological behaviors of monolithic A356 aluminum alloy castings and A356-CNT nanocomposite castings, fabricated by fully liquid and semisolid routes were examined. Samples were prepared by melt agitation, rheocasting, stir casting, and compocasting techniques. Effects of addition of carbon nanotubes (CNTs), casting process and the applied load on wear properties and mechanisms were investigated. It was found that wear loss, wear rate and friction coefficient of nanocomposite samples remarkably declined by the addition of CNTs. Moreover, changing the casting process from fully liquid to semisolid routes, plus increasing fractions of the primary phase were the two factors that improved the wear properties of the investigated samples, especially nanocomposite ones. In addition, it was revealed that adhesion and delamination were the dominant wear mechanism of the monolithic samples produced by fully liquid and semisolid routes, respectively. However, regardless of fabrication techniques, the abrasion was the main wear mechanism of nanocomposite samples.


Key words: A356 aluminum alloys; nanocomposite; compocasting; carbon nanotube (CNT); wear mechanism, wear properties

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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