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Research Papers: Friction & Wear

Study of Wear Mechanisms of a Novel Magnesium Based Hybrid Nanocomposite

[+] Author and Article Information
S. Fida Hassan

Department of Mechanical Engineering,
King Fahd University of Petroleum & Minerals,
P.O. Box 1061,
Dhahran 31261, Saudi Arabia
e-mails: sfhassan@kfupm.edu.sa; itsforfida@gmail.com

A. M. Al-Qutub

Department of Mechanical Engineering,
King Fahd University of Petroleum & Minerals,
P.O. Box 1061,
Dhahran 31261, Saudi Arabia

K. S. Tun

Technology Development Engineer
ITE College Central,
H1-01, 2 Ang Mo Kio Drive,
567720Singapore

M. Gupta

Department of Mechanical Engineering,
National University of Singapore,
9 Engineering Drive 1,
117576Singapore

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received December 3, 2013; final manuscript received June 16, 2014; published online August 27, 2014. Assoc. Editor: Robert Wood.

J. Tribol 137(1), 011601 (Aug 27, 2014) (4 pages) Paper No: TRIB-13-1245; doi: 10.1115/1.4028078 History: Received December 03, 2013; Revised June 16, 2014

Hybrid nanoreinforcement (yttria and copper) simultaneously increased strength and ductility of pure magnesium when synthesized using blend-press-microwave sinter powder metallurgy technique. Wear behavior of the magnesium hybrid nanocomposite containing 0.7 vol. % Y2O3 and 0.3 vol. % Cu reinforcement investigated using pin-on-disk dry sliding tests against hardened tool steel with a constant sliding speed of 1 m/s under a range of loads from 5 to 30 N for sliding distance up to 1000 m. Scanning electron microscopy identified abrasion and delamination as primary wear mechanisms in the hybrid nanocomposite. Limited thermal softening was observed at relatively higher test load. Adhesive wear, a common mechanism for magnesium composite, was absent in this hybrid nanocomposite wear process under the sliding condition used in this study.

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References

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Figures

Grahic Jump Location
Fig. 1

Variation of wear rate with applied load for pins of magnesium hybrid nanocomposite during dry sliding against a tool steel disk

Grahic Jump Location
Fig. 2

SEM showing: (a) grooves and scratch marks on the pin surface indicating abrasion at 5 N, (b) shallow grooves with plastic deformation at 25 N, and (c) steel strip in the wear debris of the hybrid nanocomposite due to abrasive wear of tool-steel counterface at 10 N, respectively.

Grahic Jump Location
Fig. 3

SEM showing: (a) series of fine cracks perpendicular to the sliding direction on the pin surface, generally associated with delamination at 20 N, (b) shallow crater on the pin surface where thin sheets of material have been worn away by delamination at 25 N, and (c) flake or sheetlike wear debris typical of delamination at 10 N, respectively.

Grahic Jump Location
Fig. 4

SEM showing rows of furrows, associated with adhesion, on the hybrid nanocomposite pin tested at 30 N

Grahic Jump Location
Fig. 5

SEM showing extruded layers at the trailing edge of the hybrid nanocomposite pin at 25 N

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