Dry sliding wear behaviour of aluminium–lithium alloys reinforced with SiC particles

Several wear tests were carried out at different pressures and temperatures on Al-8090 and Al-8090 + 15 vol.% SiC p. Worn specimens and debris were also examined using SEM and EDX techniques to identify the dominant wear mechanisms. Wear rate increases about two orders of magnitude when temperature...

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Bibliographic Details
Published in:Wear 2007-02, Vol.262 (3), p.292-300
Main Authors: Rodríguez, J., Poza, P., Garrido, M.A., Rico, A.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Friction, wear, lubrication
Machine components
Mechanical engineering. Machine design
Mechanically mixed layer (MML)
Metal–matrix composites (MMCs)
Sliding wear
Temperature effect
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Summary:Several wear tests were carried out at different pressures and temperatures on Al-8090 and Al-8090 + 15 vol.% SiC p. Worn specimens and debris were also examined using SEM and EDX techniques to identify the dominant wear mechanisms. Wear rate increases about two orders of magnitude when temperature is above a critical one. The transition from mild to severe wear is dependent on nominal pressure. The composite transition temperature is higher than that of the unreinforced alloy. Within the mild wear regime, the wear rates for both materials exhibit a minimum over 100 °C and are higher for the composite material than for the Al-8090 below the transition temperature. It has been also observed that the presence of mechanically mixed layers (MML) on the wear surface with varying morphology and thickness influenced the wear rate. The morphology and composition of the wear debris also change with the wear mechanism.
ISSN:0043-1648
1873-2577
DOI:10.1016/j.wear.2006.05.006