Elastic moduli and elastic anisotropy of cold sprayed metallic coatings

Resonant ultrasound spectroscopy is applied to analyze the elastic anisotropy of thick copper, aluminum, titanium, and nickel coatings prepared by cold spraying and to determine the respective elastic moduli. The results show that the coatings exhibit only weak deviations from perfect isotropy, and...

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Bibliographic Details
Published in:Surface & coatings technology 2016-04, Vol.291, p.342-347
Main Authors: Seiner, Hanuš, Cizek, Jan, Sedlák, Petr, Huang, Renzhong, Cupera, Jan, Dlouhy, Ivo, Landa, Michal
Format: Article
Language:English
Subjects:
Aluminum
CGDS
Coatings
Deposition
Deviation
Elastic anisotropy
Elastic properties
Grain refinement
Internal friction
Kinetic spray
Metals and alloys
Modulus of elasticity
Resonant ultrasound spectroscopy
Ultrasound
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Summary:Resonant ultrasound spectroscopy is applied to analyze the elastic anisotropy of thick copper, aluminum, titanium, and nickel coatings prepared by cold spraying and to determine the respective elastic moduli. The results show that the coatings exhibit only weak deviations from perfect isotropy, and the obtained elastic moduli are comparable with those of the corresponding polycrystalline bulks. The increased internal friction observed in some of the studied coatings may indicate grain refinement and consequent grain boundary sliding. •Pure Cu, Al, Ti and Ni thick coatings were prepared by high-pressure cold spraying.•Elastic constants of these coatings were determined by laser-excited contactless ultrasonic method.•Unlike other thermal sprayed methods, the cold sprayed coatings exhibit elastic isotropy.•With elastic moduli comparable to those of the corresponding polycrystalline bulks•The possible effects of grain refinement and consequent grain boundary sliding are discussed.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2016.02.057