Dry sliding wear behaviour of rheocat Al-5.7si-2cu-0.3mg alloy

M. A. Abdelgnei, Mohd. Zaidi Omar, Mariyam Jameelah Ghazali, Mohamed A. Gebril, M. N. Mohammed

Research output: Contribution to journalArticle

Abstract

In this study, the effect of improved microstructure of Al-5.7Si-2Cu-0.3Mg alloys by using semisolid process on hardness and dry sliding wear behaviour were investigated. The microstructures of conventional cast alloy were totally dendritic, while in rheocasting the dendritic transfer to fine globular microstructures after using cooling slope casting. Tribological tests were carried out by using a pinon-disc apparatus in dry sliding conditions. Wear tests were at low sliding speed 1ms-1, applied load at 50N and three different sliding distance (i.e., 1.8Km, 5.4Km and 9Km) respectively. An optical microscope and a scanning electron microscope were used to examine the micro-structure and to understand the wear mechanism on the worn surface of both samples. The results showed that, the wear resistance of rheocast alloy was improved and higher than that those produce by conventional casting. The volume loss of rheocast alloy show reduction more than 18% at 1.8Km and 10% at 9Km compared to ascast alloy. Moderate wear regimes were appeared in both alloys, according to the range of wear rate. The friction coefficient had increased due to increase in the contact point between pin and disc materials. The dominant wear mechanism for conventional and rheocasting alloys was adhesion wear and abrasive wear respectively.

Original languageEnglish
Pages (from-to)38-42
Number of pages5
JournalInternational Journal of Engineering and Technology(UAE)
Volume7
Issue number3
DOIs
Publication statusPublished - 1 Jan 2018

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Wear of materials
Rheocasting
Microstructure
Casting
Friction
Hardness
Point contacts
Abrasion
Wear resistance
Microscopes
Electron microscopes
Adhesion
Electrons
Cooling
Scanning

Keywords

  • Aluminum-Silicon alloy
  • Cooling slope
  • Wear mechanism
  • Wear resistance

ASJC Scopus subject areas

  • Biotechnology
  • Computer Science (miscellaneous)
  • Environmental Engineering
  • Chemical Engineering(all)
  • Engineering(all)
  • Hardware and Architecture

Cite this

Dry sliding wear behaviour of rheocat Al-5.7si-2cu-0.3mg alloy. / Abdelgnei, M. A.; Omar, Mohd. Zaidi; Ghazali, Mariyam Jameelah; Gebril, Mohamed A.; Mohammed, M. N.

In: International Journal of Engineering and Technology(UAE), Vol. 7, No. 3, 01.01.2018, p. 38-42.

Research output: Contribution to journalArticle

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