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Research Article | Open Access

On the origin of plasticity-induced microstructure change under sliding contacts

Yilun XU1,2( ), Daniel S. BALINT1, Christian GREINER3,4, Daniele DINI1( )
Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK
Department of Materials, Imperial College London, London SW7 2AZ, UK
Karlsruhe Institute of Technology (KIT), Institute for Applied Materials (IAM), Kaiserstrasse 12, Karlsruhe 76131, Germany
KIT IAM-CMS MicroTribology Center (µTC), Strasse am Forum 5, Karlsruhe 76131, Germany
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Abstract

Discrete dislocation plasticity (DDP) calculations are carried out to investigate the response of a single crystal contacted by a rigid sinusoidal asperity under sliding loading conditions to look for causes of microstructure change in the dislocation structure. The mechanistic driver is identified as the development of lattice rotations and stored energy in the subsurface, which can be quantitatively correlated to recent tribological experimental observations. Maps of surface slip initiation and substrate permanent deformation obtained from DDP calculations for varying contact size and normal load suggest ways of optimally tailoring the interface and microstructural material properties for various frictional loads.

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Keywords

discrete dislocation plasticityslidingsize effectmicrostructure change

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Friction
Volume 11 Issue 3,
March 2023
Pages 473-488
DOI: 10.1007/s40544-022-0624-7

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Cite this article:
XU Y, BALINT DS, GREINER C, et al. On the origin of plasticity-induced microstructure change under sliding contacts. Friction, 2023, 11(3): 473-488. https://doi.org/10.1007/s40544-022-0624-7

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Received: 28 November 2021
Revised: 20 January 2022
Accepted: 14 March 2022
Published: 18 July 2022
© The author(s) 2022.

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