期刊
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
卷 29, 期 10, 页码 1993-2004出版社
ELSEVIER
DOI: 10.1016/S1003-6326(19)65107-1
关键词
A356 aluminum alloys; nanocomposite; compocasting; carbon nanotube (CNT); wear mechanism; wear properties
资金
- Ministry of Science and Higher Education of the Russian Federation [K2-2019-007, 211]
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.
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