| Download | - Will be available here on March 4, 2027
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| DOI | Resolve DOI: https://doi.org/10.1007/s11666-026-02178-6 |
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| Author | Search for: Sripada, Jagannadh; Search for: Thibault, Alexis; Search for: Hof, Lucas; Search for: Bocher, Philippe; Search for: Béland, Jean-François1; Search for: Vo, Phuong1; Search for: Irissou, Éric1ORCID identifier: https://orcid.org/0000-0002-0691-9152 |
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| Affiliation | - National Research Council Canada. Automotive and Surface Transportation
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| Format | Text, Article |
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| Subject | adhesion testing; coatings; cold spray; laser surface treatment; roughness |
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| Abstract | The effect of pulsed laser ablation as a substrate pretreatment technique on the adhesive strength of cold-sprayed Al6061 coatings deposited onto extruded Al6061 substrates was investigated. The influence of laser ablation parameters on the surface morphology and roughness of extruded Al 6061 substrates were systematically examined. A Nd:YAG pulsed laser (1.064 µm, 12 ns, 30 Hz) was employed with fluences ranging from 1.55 to 3.53 J/cm² and surface coverages between 5.8 × and 109.6 × . Distinct morphological evolution stages were observed, progressing from irradiated and dimpled textures at low laser exposures to cauliflower-like structures at higher exposures. This transformation was primarily governed by cumulative surface coverage resulting from overlapping laser passes, indicating that surface coverage plays a more dominant role than fluence in driving morphological changes. Surface texturing emerged at a threshold of approximately 8.4 × coverage. Cold spray deposition was subsequently performed on the laser-textured substrates and compared to coatings prepared using conventional pretreatments, including grit blasting and degreasing. Adhesion strength was assessed via two mechanical testing methods (ASTM C633 and a modified ASTM E8). Laser texturing produced substantial improvements in coating adhesion, with increases of up to 242% relative to grit-blasted substrates. A maximum bond strength of 90 MPa was achieved at a fluence of 3.53 J/cm² and 8.4 × surface coverage. These findings demonstrate that controlled laser ablation can effectively tailor surface morphology to significantly enhance the adhesion performance of cold-sprayed Al 6061 coatings. |
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| Date published | 2026-03-04 |
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| Publisher | Springer Nature |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 24f1dbd9-65b6-461a-bf84-146300bad7b3 |
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| Record created | 2024-03-21 |
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| Record modified | 2026-06-26 |
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