Wear behavior of AZ91E/AlN metal matrix composites

[Display omitted] •After 12N sliding tests, an alinement in the direction of the wear track of reinforcement particles was seen.•Abrasive wear was dominant in AZ91E samples, meanwhile, the oxidative was in the MMC.•Oxidative products presented on worn tracks act as lubricants reducing the wear of MM...

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Bibliographic Details
Published in:Materials letters 2022-06, Vol.317, p.132080, Article 132080
Main Authors: Arreola-Fernández, Carlos, Lemus-Ruiz, José, Jiménez-Alemán, Omar, Bedolla, Egberto
Format: Article
Language:English
Subjects:
Abrasion
AlN particles
Aluminum
Aluminum nitride
AZ91E magnesium alloy
Coefficient of friction
Frictional wear
Magnesium
Materials science
Metal matrix composites
Metallic composite
Oxidation
Sliding friction
Sliding wear
Wear mechanisms
Wear resistance
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Summary:[Display omitted] •After 12N sliding tests, an alinement in the direction of the wear track of reinforcement particles was seen.•Abrasive wear was dominant in AZ91E samples, meanwhile, the oxidative was in the MMC.•Oxidative products presented on worn tracks act as lubricants reducing the wear of MMCs.•Under fretting, wear resistance of AZ91E increased 3 to 10 times with the addition of AlN particles. Dry sliding wear behavior of a Magnesium-AZ91E alloy and aluminum nitride (50 vol%) reinforced composites was studied under normal loads of 2–12N and frequencies of 1–3 Hz against a SAE 52,100 steel spherical counterpart. For a better understanding of the wear mechanisms, surfaces and sub-surfaces of the worn tracks were studied. Abrasion and oxidation were found as the dominant wear mechanisms in both, base alloy, and composites samples. After 12N sliding tests, an alinement in the direction of the wear track of reinforcement particles was seen. Despite AZ91E alloy exhibited lower Coefficient of Friction (CoF), composites showed superior wear resistance up to 10 times higher than the base alloy. It was found that the addition of reinforcing aluminum nitride (50 vol%). to the Magnesium-AZ91E alloy was favorable by increasing the wear resistance under tested conditions.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2022.132080