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Aluminum protective coatings - Fatigue and bond strength properties with respect to surface preparation techniques: Laser ablation, shot peening and grit blasting
Industrial Materials Institute, NRC, Boucherville, Que., Canada.
University West, Department of Technology, Mathematics and Computer Science.
Université de Technologie Belfort-Montbéliard, Laboratoire d'Etudes et des Recherches sur les Materiaux les Procedes et les Surfaces (LERMPS).
Royal Military College of Canada, Department of Mechanical Engineering.
2006 (English)In: Canadian metallurgical quarterly, ISSN 0008-4433, E-ISSN 1879-1395, Vol. 45, no 1, p. 49-58Article in journal (Refereed) Published
Abstract [en]

Aluminum coatings can provide galvanic cathodic protection for several metals and alloys. In order to be a suitable protective solution on structural components, the mechanical integrity must be preserved. In particular, the fatigue properties are a challenge for thermal spray protective coatings on mechanical structures. To address the issue of the fatigue integrity of 7075 aluminum alloy with an arc sprayed protective coating, different surface preparations prior to arc spraying were considered. In the present work, a feasibility study was performed using laser ablation as a surface preparation technique before or during arc spraying of coatings through collaboration between the LERMPS laboratory in France, the National Research Council of Canada and the Royal Military College of Canada. Both fatigue and adhesive properties of aluminum coatings were evaluated in relation to substrate surface preparation techniques including laser ablation (PROTAL® process), grit blasting and shot peening. Results indicate that a combination of key conditions including using nitrogen as the arc spray gas, shot peening and proper laser energy density for ablation provides high fatigue resistance of metallic coated 7075 alloy substrates. Specimens prepared under these conditions show a similar fatigue resistance to uncoated substrates. © Canadian Institute of Mining, Metallurgy and Petroleum.

Place, publisher, year, edition, pages
2006. Vol. 45, no 1, p. 49-58
Keywords [en]
Aluminum alloys, Blasting, Bond strength (materials), Fatigue of materials, Laser ablation, Shot peening, Surface chemistry, Aluminum protective coatings, Grit blasting, Mechanical integrity, Surface preparation, Protective coatings
National Category
Materials Engineering
Research subject
Engineering, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-1800ISBN: 00084433 (print)OAI: oai:DiVA.org:hv-1800DiVA, id: diva2:272052
Available from: 2009-10-14 Created: 2009-10-08 Last updated: 2017-12-12Bibliographically approved

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CiteExportLink to record
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Citation style
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  • nn-NB
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