Plastic deformation phenomena during cold spray impact of WC-Co particles onto metal substrates

Plastic deformation phenomena during cold spray impact of WC-Co particles onto metal substrates

This paper studies the plastic deformation phenomena in ductile substrates (Al7075 alloy, carbon steel) during cold spray-deposition of WC-Co. Metallographic inspection of etched cross-sections and through-thickness nano-hardness profiling indicate that plastic deformation of the substrate (into whi...

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Bibliographic Details
Published in:Acta materialia 2017-02, Vol.124, p.173-181
Main Authors: Dosta, S., Bolelli, Giovanni, Candeli, Alessia, Lusvarghi, Luca, Cano, Irene Garcia, Guilemany, Josep Maria
Format: Article
Language:eng
Subjects:
Cermets
Finite element modelling (FEM)
Impact behaviour
Kinetic spraying
Nanoindentation
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Summary:This paper studies the plastic deformation phenomena in ductile substrates (Al7075 alloy, carbon steel) during cold spray-deposition of WC-Co. Metallographic inspection of etched cross-sections and through-thickness nano-hardness profiling indicate that plastic deformation of the substrate (into which undeformed WC-Co particles penetrate deep) is confined to a shallow area, below which the material appears unaltered. Adiabatic deformation phenomena in the substrate are revealed by finite element modelling of the impact process. Close to the surface, the temperature raises in less than 10 ns, leading to metal jetting, whilst the underlying material, below a depth of few micrometres, is substantially unaffected. [Display omitted]
ISSN:1359-6454
1873-2453