Effects of Gd/Nd Ratio and Aging Treatment on Wear Behavior of Mg-Nd-Gd-Sr-Zn-Zr Alloys

The Mg-(4-x)Nd-xGd-0.3Sr-0.2Zn-0.4Zr (x = 0, 1, 2, and 3 wt%, Gd/Nd = 0, 1/3, 1, and 3) alloys were hot extruded and then aged (T5). The friction and wear properties of the as-extruded and as-aged alloys were studied using a ball-on-disk wear testing machine and a scanning electron microscope to rev...

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Bibliographic Details
Published in:Coatings (Basel) 2024-01, Vol.14 (1), p.7
Main Authors: Wang, Ruotian, Wang, Rongxiang, Jia, Yongqiang
Format: Article
Language:English
Subjects:
Abrasive wear
Aging
Aging (metallurgy)
Alloys
Coefficient of friction
Experiments
Extrusion rate
Friction
Gadolinium
Grain boundaries
Grain size
Laminated materials
Magnesium base alloys
Microstructure
Oxidation resistance
Ratios
Raw materials
Specialty metals industry
Testing equipment
Wear mechanisms
Wear rate
Wear resistance
Zinc compounds
Zirconium
Zirconium alloys
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Summary:The Mg-(4-x)Nd-xGd-0.3Sr-0.2Zn-0.4Zr (x = 0, 1, 2, and 3 wt%, Gd/Nd = 0, 1/3, 1, and 3) alloys were hot extruded and then aged (T5). The friction and wear properties of the as-extruded and as-aged alloys were studied using a ball-on-disk wear testing machine and a scanning electron microscope to reveal the impacts of the Gd/Nd ratio and aging treatment. The results show that the friction coefficient of the as-extruded alloys increases first and then decreases with increasing Gd/Nd ratio. After aging, the friction coefficient of the alloys decreases slightly. The Gd/Nd ratio has no significant effect on the wear rate of the as-extruded alloys, and the wear rate decreases first and then increases with the increase in the Gd/Nd ratio for the as-aged alloys. The T5 alloy with a Gd/Nd ratio of 1/3 has the best wear resistance. The wear mechanisms of alloys mainly include abrasive wear, oxidation wear, and delamination wear.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings14010007