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Investigation of corrosion behaviour of aluminium alloy subjected to laser shock peening without a protective coating
Trdan, Uroš (Author), Grum, Janez (Author)

URLURL - Presentation file, Visit http://dx.doi.org/10.1155/2015/705306 This link opens in a new window

Abstract
The effect of shock waves and strain hardening of laser shock peening without protective coating (LSPwC) on alloy AA 6082- T651 was investigated. Analysis of residual stresses confirmed high compression in the near surface layer due to the ultrahigh plastic strains and strain rates induced bymultiple laser shock waves. Corrosion tests in a chloride environment were carried out to determine resistance to localised attack, which was also verified on SEM/EDS. OCP transients confirmed an improved condition, that is, amore positive and stable potential after LSPwCtreatment.Moreover, polarisation resistance of the LSPwCtreated specimen was by a factor of 25 higher compared to the untreated specimen. Analysis of voltammograms confirmed an improved enhanced region of passivity and significantly smaller anodic current density of the LSPwC specimen compared to the untreated one.Through SEM, reduction of pitting attack at the LSPwC specimen surface was confirmed, despite its increased roughness.

Language:English
Keywords:laser shock peening, residual stresses, electrochemical corrosion, polarisation, SEM/EDS analysis
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Year:2015
Number of pages:str. 1-9
Numbering:Vol. 2015
UDC:620.1(045)
ISSN on article:1687-8434
DOI:10.1155/2015/705306 Link is opened in a new window
COBISS.SI-ID:14377243 Link is opened in a new window
Views:976
Downloads:195
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Record is a part of a journal

Title:Advances in Materials Science and Engineering
Shortened title:Adv. Mater. Sci. Eng.
Publisher:Hindawi Publishing Corporation
ISSN:1687-8434
COBISS.SI-ID:517497881 This link opens in a new window

Secondary language

Language:Slovenian
Keywords:lasersko udarno utrjevanje, zaostale napetosti, elektrokemijska korozija, polarizacija, SEM/EDS analiza

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