Cold gas dynamic spraying of metal matrix composite coatings with subsequent friction stir processing
- Peat T. ,
- Galloway A. ,
- Toumpis A.I. ,
- et al
- Peat T. ,
- Galloway A. ,
- Toumpis A.I. ,
- McNutt P. and
- Iqbal N.
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Description
With regard to the application of wear resistant surface layers on chosen substrates, an investigation is presented into the deposition of cermet (WC, 10%Co, 4%Cr or Cr3C2-NiCr) and oxide (Al2O3) coatings onto AA 5083 aluminium alloy substrates by cold gas dynamic spraying, subsequent friction stir processing (FSP) and microstructural characterisation of the particle reinforced metal matrix composite (MMC) coatings. To improve the efficiency of cold spraying, coatings were co-deposited with powdered AA 5083. FSP was carried out using an H13 grade tool steel at a rotational speed of 600 rpm, traverse speed of 272 mm/min, plunge depth of 3.8 mm and tilt angle of 3 deg. The specimen testing programme incorporated microstructure observations by optical microscopy, SEM and energy dispersive spectroscopy as well as microhardness measurements. The improved dispersal of reinforcing particles within the MMC layer is discussed.
11th International Symposium, 17-19 May 2016, Poster Session, Paper 12
Subjects
- Composite materials
- Material
- Matrix composites
- Coatings
- Surfacing
- Process
- Composite coatings
- Spraying
- Cold spraying
- Surface engineering
- Friction stir processing
- Microstructure
- Mechanical properties
- Properties
- Hardness
- Strength
- Tribological properties
- Wear
- Ceramics
- Nonmetallic coatings
- Particle reinforced composites
- Process conditions
- Sprayed coatings
- Aluminium and Al alloys
- Nonferrous
- 5xxx Al series
- Powder
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