On the origin of plastic deformation and surface evolution in nano-fretting: a discrete dislocation plasticity analysis
File(s)
Published version
Author(s)
Xu, Yilun
Balint, Daniel
Dini, Daniele
Type
Journal Article
Abstract
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.
Date Issued
2021-10-29
Date Acceptance
2021-10-26
Citation
Materials, 2021, 14 (21), pp.1-14
ISSN
1996-1944
Publisher
MDPI
Start Page
1
End Page
14
Journal / Book Title
Materials
Volume
14
Issue
21
Copyright Statement
© 2021 by the authors.
Licensee MDPI, Basel, Switzerland.
This article is an open access article
distributed under the terms and
conditions of the Creative Commons
Attribution (CC BY) license (https://
creativecommons.org/licenses/by/
4.0/).
Licensee MDPI, Basel, Switzerland.
This article is an open access article
distributed under the terms and
conditions of the Creative Commons
Attribution (CC BY) license (https://
creativecommons.org/licenses/by/
4.0/).
License URL
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Identifier
https://www.mdpi.com/1996-1944/14/21/6511
Grant Number
EP/N025954/1
Subjects
Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Physics, Applied
Physics, Condensed Matter
Chemistry
Materials Science
Physics
discrete dislocation plasticity
contact
nano-fretting
size effect
CRYSTAL PLASTICITY
CRACK NUCLEATION
CONTACTS SUBJECT
FINITE-ELEMENT
SCRATCH TESTS
SLIP REGIME
FATIGUE
WEAR
INDENTATION
ORIENTATION
contact
discrete dislocation plasticity
nano-fretting
size effect
03 Chemical Sciences
09 Engineering
Publication Status
Published
Article Number
ARTN 6511