Header menu link for other important links
X
Effect of detonation gun sprayed Cu-Ni-In coating on plain fatigue and fretting fatigue behaviour of Al-Mg-Si alloy
Published in
2006
Volume: 201
   
Issue: 3-4
Pages: 1548 - 1558
Abstract

Detonation gun spray technique was employed to coat Al-Mg-Si alloy (AA 6063) specimens with Cu-Ni-In powder. Coated samples were characterized with reference to the microstructure, porosity, residual stresses, microhardness and surface roughness. Plain fatigue (without fretting) and fretting fatigue tests were carried out at room temperature on uncoated and coated specimens. The detonation gun spray process resulted in a dense coating of almost uniform deposition with low porosity (0.3%) and good adhesion between the substrate and the coating. Under plain fatigue loading 40 μm thick coated samples exhibited superior lives compared with uncoated and 100 μm thick coated specimens due to the presence of higher surface compressive residual stress in the former. Delamination-induced failure resulted in inferior lives of 100 μm thick coated specimens. Under fretting fatigue deformation 40 μm thick coated specimens exhibited superior lives compared with 100 μm thick coated samples owing to higher compressive residual stress at the surface and better interfacial adhesion. At 120 MPa stress level 40 μm thick coated specimens exhibited superior fretting fatigue life compared with uncoated sample and at stress levels above 120 MPa the converse was true. This was attributed to interface cracking at higher stress levels. © 2006 Elsevier B.V. All rights reserved.

About the journal
JournalSurface and Coatings Technology
ISSN02578972
Open AccessNo
Concepts (14)
  •  related image
    Adhesion
  •  related image
    Aluminum alloys
  •  related image
    Compressive stress
  •  related image
    CORROSION FATIGUE
  •  related image
    Crack initiation
  •  related image
    Delamination
  •  related image
    Detonation
  •  related image
    FRETTING CORROSION
  •  related image
    Porosity
  •  related image
    Residual stresses
  •  related image
    DETONATION GUN SPRAY TECHNIQUE
  •  related image
    FRETTING FATIGUE
  •  related image
    Sprayed coatings
  •  related image
    FRETTING CORROSION