Header menu link for other important links
X
Effect of microarc oxidised layer thickness on plain fatigue and fretting fatigue behaviour of Al-Mg-Si alloy
Published in
2008
Volume: 30
   
Issue: 7
Pages: 1259 - 1266
Abstract
The objective of this work was to investigate the performance of microarc oxide coatings of two different thicknesses (40 and 100 μm) on Al-Mg-Si alloy samples under plain fatigue and fretting fatigue loadings. Tensile residual stress present in the substrate of 40 μm thick coated samples induced early crack initiation in the substrate and so their plain fatigue lives were shorter than those of untreated specimens. Presence of more pores and tensile surface residual stress in 100 μm thick coated samples caused early crack initiation at the surface leading to their inferior plain fatigue lives compared with 40 μm thick coated samples. While the differences between the lives of coated and uncoated specimens were significant under plain fatigue loading, this was not the case under fretting fatigue loading. This may be attributed to relatively higher surface hardness of coated specimens. The performance of 40 μm thick coated samples was better than that of 100 μm thick coated specimens under both plain fatigue and fretting fatigue loadings. © 2007 Elsevier Ltd. All rights reserved.
About the journal
JournalInternational Journal of Fatigue
ISSN01421123
Open AccessNo
Concepts (13)
  •  related image
    Fatigue of materials
  •  related image
    Force measurement
  •  related image
    Friction
  •  related image
    Load testing
  •  related image
    Magnesium alloys
  •  related image
    Residual stresses
  •  related image
    Silicon alloys
  •  related image
    Thickness control
  •  related image
    COATED SPECIMENS
  •  related image
    FRETTING FATIGUES
  •  related image
    Friction forces
  •  related image
    MICROARC OXIDATION
  •  related image
    Aluminum alloys