On the Origin of Plastic Deformation and Surface Evolution in Nano-Fretting: A Discrete Dislocation Plasticity Analysis

Discrete dislocation plasticity (DDP) calculations were carried out to investigate a single-crystal response when subjected to nano-fretting loading conditions in its interaction with a rigid sinusoidal asperity. The effects of the contact size and preceding indentation on the surface stress and pro...

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Autores principales:	Yilun Xu, Daniel S. Balint, Daniele Dini
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	discrete dislocation plasticity contact nano-fretting size effect Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/54056d9ad93b495d84176e42ff63bc58
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spelling	oai:doaj.org-article:54056d9ad93b495d84176e42ff63bc582021-11-11T18:05:01ZOn the Origin of Plastic Deformation and Surface Evolution in Nano-Fretting: A Discrete Dislocation Plasticity Analysis10.3390/ma142165111996-1944https://doaj.org/article/54056d9ad93b495d84176e42ff63bc582021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6511https://doaj.org/toc/1996-1944Discrete dislocation plasticity (DDP) calculations were carried out to investigate a single-crystal response when subjected to nano-fretting loading conditions in its interaction with a rigid sinusoidal asperity. The effects of the contact size and preceding indentation on the surface stress and profile evolution due to nano-fretting were extensively investigated, with the aim to unravel the deformation mechanisms governing the response of materials subjected to nano-motion. The mechanistic drivers for the material’s permanent deformations and surface modifications were shown to be the dislocations’ collective motion and piling up underneath the contact. The analysis of surface and subsurface stresses and the profile evolution during sliding provides useful insight into damage and failure mechanisms of crystalline materials subject to nano-fretting; this can lead to improved strategies for the optimisation of material properties for better surface resistance under micro- and nano-scale contacts.Yilun XuDaniel S. BalintDaniele DiniMDPI AGarticlediscrete dislocation plasticitycontactnano-frettingsize effectTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6511, p 6511 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	discrete dislocation plasticity contact nano-fretting size effect Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	discrete dislocation plasticity contact nano-fretting size effect Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Yilun Xu Daniel S. Balint Daniele Dini On the Origin of Plastic Deformation and Surface Evolution in Nano-Fretting: A Discrete Dislocation Plasticity Analysis
description	Discrete dislocation plasticity (DDP) calculations were carried out to investigate a single-crystal response when subjected to nano-fretting loading conditions in its interaction with a rigid sinusoidal asperity. The effects of the contact size and preceding indentation on the surface stress and profile evolution due to nano-fretting were extensively investigated, with the aim to unravel the deformation mechanisms governing the response of materials subjected to nano-motion. The mechanistic drivers for the material’s permanent deformations and surface modifications were shown to be the dislocations’ collective motion and piling up underneath the contact. The analysis of surface and subsurface stresses and the profile evolution during sliding provides useful insight into damage and failure mechanisms of crystalline materials subject to nano-fretting; this can lead to improved strategies for the optimisation of material properties for better surface resistance under micro- and nano-scale contacts.
format	article
author	Yilun Xu Daniel S. Balint Daniele Dini
author_facet	Yilun Xu Daniel S. Balint Daniele Dini
author_sort	Yilun Xu
title	On the Origin of Plastic Deformation and Surface Evolution in Nano-Fretting: A Discrete Dislocation Plasticity Analysis
title_short	On the Origin of Plastic Deformation and Surface Evolution in Nano-Fretting: A Discrete Dislocation Plasticity Analysis
title_full	On the Origin of Plastic Deformation and Surface Evolution in Nano-Fretting: A Discrete Dislocation Plasticity Analysis
title_fullStr	On the Origin of Plastic Deformation and Surface Evolution in Nano-Fretting: A Discrete Dislocation Plasticity Analysis
title_full_unstemmed	On the Origin of Plastic Deformation and Surface Evolution in Nano-Fretting: A Discrete Dislocation Plasticity Analysis
title_sort	on the origin of plastic deformation and surface evolution in nano-fretting: a discrete dislocation plasticity analysis
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/54056d9ad93b495d84176e42ff63bc58
work_keys_str_mv	AT yilunxu ontheoriginofplasticdeformationandsurfaceevolutioninnanofrettingadiscretedislocationplasticityanalysis AT danielsbalint ontheoriginofplasticdeformationandsurfaceevolutioninnanofrettingadiscretedislocationplasticityanalysis AT danieledini ontheoriginofplasticdeformationandsurfaceevolutioninnanofrettingadiscretedislocationplasticityanalysis
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On the Origin of Plastic Deformation and Surface Evolution in Nano-Fretting: A Discrete Dislocation Plasticity Analysis

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