Effect of pulsed laser ablation and continuous laser heating on the adhesion and cohesion of cold sprayed Ti-6Al-4V coatings

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DOIResolve DOI: http://doi.org/10.1007/s11666-012-9812-8
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleJournal of Thermal Spray Technology
ISSN1059-9630
1544-1016
Volume21
Issue6
Pages13221333; # of pages: 12
Subjectadhesion strength; cold spray; continuous laser pre-heating; gas dynamic spray; kinetic spray; LASAT; pulsed laser ablation; surface preparation; Ti-6Al-4V
AbstractThe individual and cumulative effects of in situ pulsed laser ablation and continuous laser pre-heating on adhesion and cohesion strength of cold sprayed Ti-6Al-4V coatings are investigated. Laser beams were coupled to a cold spray gun in order to ablate and pre-heat the substrate surface a few milliseconds prior to the impact of the spray particles. Cohesion and adhesion strength were evaluated by scratch test, standard ASTM C633 pull test and laser shock (LASAT) technique. The effects of laser ablation before and during cold spray operations were investigated. Results demonstrate that laser ablation of the substrate before cold spraying led to a smooth surface which improved adhesion strength. However, when laser ablation was maintained throughout the cold spray process, i.e., in between the coating layers, a reduction of cohesion and adhesion was observed. These negative effects were circumvented when laser ablation and laser pre-heating were combined.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; Energy, Mining and Environment; Automotive
Peer reviewedYes
Identifier9812
NRC number53132
NPARC number21268428
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Record identifierecb01057-0bb8-466b-9df1-41e01aa6342b
Record created2013-07-11
Record modified2016-05-09
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