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Application of massive laser shock processing for improvement of mechanical and tribological properties
ID Trdan, Uroš (Author), ID Skarba, M. (Author), ID Porro, Juan Antonio (Author), ID Ocaña, José Luis (Author), ID Grum, Janez (Author)

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Abstract
The present paper aims to investigate topographical, microstructural, mechanical and tribological behaviour of precipitation hardened Al alloy subjected to massive laser shock processing (LSP) without protective coating at 2500 pulses/cm2, using three beam diameters. Wear tests under dry sliding conditions resulted in severe wear, whereas the main wear mechanisms were adhesion accompanied by abrasive wear. Nevertheless, LSP with optimal processing parameters reduce the friction coefficient and wear rate with lower degrees of adhesion and abrasion inside the wear track in comparison to the untreated sample. The enhanced tribological performance is attributed to the positive influence of LSP induced surface topography, surface compressive residual stresses (RS) and dense dislocation arrangements, as the result of high-pressure shock waves. Nonetheless, due to the narrow window of optimal parameters reduced wear resistance as a consequence of undesired thermal/softening effect due to laser ablation and melting was detected with non-optimal processing parameters.

Language:English
Keywords:laser shock processing, aluminium alloy, wear, microhardness, residual stress, microstructure
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Publication status:Published
Publication version:Author Accepted Manuscript
Submitted for review:15.11.2017
Article acceptance date:21.02.2018
Publication date:15.03.2018
Year:2018
Number of pages:Str. 1-11
Numbering:Vol. 342
PID:20.500.12556/RUL-127244 This link opens in a new window
UDC:620.1(045)
ISSN on article:0257-8972
DOI:10.1016/j.surfcoat.2018.02.084 This link opens in a new window
COBISS.SI-ID:15941915 This link opens in a new window
Publication date in RUL:28.05.2021
Views:957
Downloads:310
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Record is a part of a journal

Title:Surface & coatings technology
Shortened title:Surf. coat. technol.
Publisher:Elsevier
ISSN:0257-8972
COBISS.SI-ID:3084815 This link opens in a new window

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:25.05.2018

Secondary language

Language:Slovenian
Keywords:lasersko udarno utrjevanje, aluminijeva zlitina, obraba, mikrotrdota, zaostale napetosti, mikrostruktura

Projects

Funder:ARRS - Slovenian Research Agency
Project number:P2-0270
Name:Proizvodni sistemi, laserske tehnologije in spajanje materialov

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