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Experimental and modelling study of friction evolution and lubricant breakdown behaviour under varying contact conditions in warm aluminium forming processes

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Title: Experimental and modelling study of friction evolution and lubricant breakdown behaviour under varying contact conditions in warm aluminium forming processes
Authors: Wang, L
Yang, X
Liu, X
Liu, H
Politis, DJ
Leyvraz, D
Item Type: Journal Article
Abstract: The lubricant behaviours under varying contact conditions were investigated by conducting pin-on-strip tests between P20 tool steel and AA7075 aluminium alloy using an automated testing system, Tribo-Mate. The effects of temperature changes, and rapid load and speed changes on the coefficient of friction (COF) and lubricant breakdown phenomenon were experimentally studied. The evolutions of COF showed three distinct stages, indicating the transformation from boundary lubrication condition to dry sliding condition. The value of COF at the initial stage was found to increase with increasing temperature. The increase of temperature, contact load and sliding speed caused an earlier breakdown of the lubricant. An interactive friction model was developed to predict friction evolutions at varying contact conditions. A close agreement with errors less than 6.8% were achieved between the model predictions and experimental results.
Issue Date: 1-Jun-2021
Date of Acceptance: 12-Feb-2021
URI: http://hdl.handle.net/10044/1/87880
DOI: 10.1016/j.triboint.2021.106934
ISSN: 0301-679X
Publisher: Elsevier
Start Page: 1
End Page: 11
Journal / Book Title: Tribology International
Volume: 158
Issue: 1
Copyright Statement: © 2021 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor/Funder: Heilongjiang Academy of Sciences Institute of Automation
Funder's Grant Number: Heilongjiang-Imperial-int manu
Keywords: 0910 Manufacturing Engineering
0913 Mechanical Engineering
Mechanical Engineering & Transports
Publication Status: Published
Article Number: 106934
Online Publication Date: 2021-02-18
Appears in Collections:Mechanical Engineering



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