
Proceedings Paper
Analysis of residual stress and corrosion resistance of laser shock-processed 6012 and 6082 aluminium alloysFormat | Member Price | Non-Member Price |
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Paper Abstract
The paper provides a thorough analysis of a surface layer prior to and after Laser Shock Processing under different
parameter conditions. Optimum conditions were determined using a factorial design aided with an analysis of variance
(ANOVA). As the first experimental factor, pulse density with 900 and 2500 pulse/cm2 was chosen. The second factor
was the type of material, i.e. aluminium alloys ENAW 6012 and ENAW 6082. Evaluation of different conditions of
specimen treatment was made using three response variables, i.e. surface roughness, magnitude of residual stresses, and
corrosion resistance given by pitting potential (Epitt). A thorough analysis of the modified surface layer was made with
measurement of microhardness, and with images obtained in optical and electronic microscopy (SEM) and energy
dispersion spectroscopy (EDS) to determine corrosion products around the pits formed after corrosion testing. The
experiments confirmed characteristic influences of individual LSP parameters on properties of the treated material
surfaces. ENAW 6012 aluminium alloy showed better corrosion resistance than ENAW 6082 alloy with lower pitting
attack at its surface. Corrosion tests showed that a higher pulse density produces shifting of the pitting potential to more
positive values, which ensures higher corrosion resistance from the viewpoint of preserving a passive protecting film on
the surface layer.
Paper Details
Date Published: 21 April 2009
PDF: 8 pages
Proc. SPIE 7131, XVII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 713124 (21 April 2009); doi: 10.1117/12.816643
Published in SPIE Proceedings Vol. 7131:
XVII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
Rui Vilar; Olinda Conde; Marta Fajardo; Luís O. Silva; Margarida Pires; Andrei Utkin, Editor(s)
PDF: 8 pages
Proc. SPIE 7131, XVII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 713124 (21 April 2009); doi: 10.1117/12.816643
Show Author Affiliations
Published in SPIE Proceedings Vol. 7131:
XVII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
Rui Vilar; Olinda Conde; Marta Fajardo; Luís O. Silva; Margarida Pires; Andrei Utkin, Editor(s)
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