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Low friction of metallic multilayers by formation of a shear-induced alloy

During sliding of metallic surfaces, the near surfaces undergo significant changes in terms of topography, composition and microstructure. Since friction and wear behavior of the materials are strongly influenced by sub-surface deformations, it is fundamental to investigate these effects. Therefore,...

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Autores principales: Cihan, Ebru, Störmer, Heike, Leiste, Harald, Stüber, Michael, Dienwiebel, Martin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6602972/
https://www.ncbi.nlm.nih.gov/pubmed/31263229
http://dx.doi.org/10.1038/s41598-019-45734-7
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author Cihan, Ebru
Störmer, Heike
Leiste, Harald
Stüber, Michael
Dienwiebel, Martin
author_facet Cihan, Ebru
Störmer, Heike
Leiste, Harald
Stüber, Michael
Dienwiebel, Martin
author_sort Cihan, Ebru
collection PubMed
description During sliding of metallic surfaces, the near surfaces undergo significant changes in terms of topography, composition and microstructure. Since friction and wear behavior of the materials are strongly influenced by sub-surface deformations, it is fundamental to investigate these effects. Therefore, the present study aims towards a better understanding of the behavior of friction depending on well-defined initial microstructures. By performing sliding experiments on Au-Ni multilayer samples under ultrahigh vacuum (UHV) conditions, we observe that the individual layer thickness of multilayer systems has a strong influence on friction behavior due to the transition in the dominant deformation mechanism near the surface. The experiments reported here provide a new route for lowering the friction force of metallic material systems in dry contact by providing more stable microstructures and alloy formation. Through ultrafine grains present in the alloy formed by mechanical mixing the number of grain boundaries strongly increases and hence, grain boundary-mediated deformation results in the low friction coefficient.
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spelling pubmed-66029722019-07-14 Low friction of metallic multilayers by formation of a shear-induced alloy Cihan, Ebru Störmer, Heike Leiste, Harald Stüber, Michael Dienwiebel, Martin Sci Rep Article During sliding of metallic surfaces, the near surfaces undergo significant changes in terms of topography, composition and microstructure. Since friction and wear behavior of the materials are strongly influenced by sub-surface deformations, it is fundamental to investigate these effects. Therefore, the present study aims towards a better understanding of the behavior of friction depending on well-defined initial microstructures. By performing sliding experiments on Au-Ni multilayer samples under ultrahigh vacuum (UHV) conditions, we observe that the individual layer thickness of multilayer systems has a strong influence on friction behavior due to the transition in the dominant deformation mechanism near the surface. The experiments reported here provide a new route for lowering the friction force of metallic material systems in dry contact by providing more stable microstructures and alloy formation. Through ultrafine grains present in the alloy formed by mechanical mixing the number of grain boundaries strongly increases and hence, grain boundary-mediated deformation results in the low friction coefficient. Nature Publishing Group UK 2019-07-01 /pmc/articles/PMC6602972/ /pubmed/31263229 http://dx.doi.org/10.1038/s41598-019-45734-7 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Cihan, Ebru
Störmer, Heike
Leiste, Harald
Stüber, Michael
Dienwiebel, Martin
Low friction of metallic multilayers by formation of a shear-induced alloy
title Low friction of metallic multilayers by formation of a shear-induced alloy
title_full Low friction of metallic multilayers by formation of a shear-induced alloy
title_fullStr Low friction of metallic multilayers by formation of a shear-induced alloy
title_full_unstemmed Low friction of metallic multilayers by formation of a shear-induced alloy
title_short Low friction of metallic multilayers by formation of a shear-induced alloy
title_sort low friction of metallic multilayers by formation of a shear-induced alloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6602972/
https://www.ncbi.nlm.nih.gov/pubmed/31263229
http://dx.doi.org/10.1038/s41598-019-45734-7
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