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Research Article | Open Access

Sliding wear behavior of fully nanotwinned Cu alloys

Jianfeng YAN1,2, Andrew LINDO1, Ruth SCHWAIGER3, Andrea M. HODGE1( )
Department of Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, CA 90089, USA
Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Institute for Applied Materials, Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen 76344, Germany
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Abstract

Highly nanotwinned (NT) metals have advantages such as high strength, good ductility, favorable corrosion resistance, and thermal stability. It has been demonstrated that the introduction of high density NT microstructures can enhance the tribological properties of metals. However, the influence of the microstructure and the composition of NT alloys on the tribological behavior are not clear. In this work, the sliding wear behavior of fully NT materials, specifically Cu-Al and Cu-Ni alloys, are studied by a nanoscratch technique using a nanoindenter. The effects of microstructure and chemical composition on the wear properties are also studied. The results show that the chemical composition has an obvious influence on the wear resistance and microstructural deformation. For NT Cu-Al alloys, the hardness and sliding wear resistance improve with increased Al content from Cu-2wt.%Al to Cu-6wt.%Al. NT Cu-10wt.%Ni alloy shows even better wear resistance than Cu-6wt.%Al. The microstructural analysis shows that NT Cu alloys with higher wear resistance correspond to a smaller deformation-affected zone. The improvement of sliding wear properties of Cu-Al alloys with higher Al content may be ascribed to their decreased stacking fault energy. NT Cu-Ni alloy shows better wear resistance than Cu-Al alloy, this may be related to the formation of intermetallic compounds in Cu-Al system. This study broadens the knowledge about tribological properties of NT materials and provides a potential method to optimize their sliding wear resistance by altering the chemical composition of NT Cu alloys.

Keywords

nanotwinned alloysthin filmstacking fault energytribology

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Friction
Volume 7 Issue 3,
June 2019
Pages 260-267
DOI: 10.1007/s40544-018-0220-z
Cite this article:
YAN J, LINDO A, SCHWAIGER R, et al. Sliding wear behavior of fully nanotwinned Cu alloys. Friction, 2019, 7(3): 260-267. https://doi.org/10.1007/s40544-018-0220-z

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Received: 01 October 2017
Revised: 25 January 2018
Accepted: 24 April 2018
Published: 25 July 2018
© The author(s) 2018

This article is published with open access at Springerlink.com

Open Access: The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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