4.7 Article

Investigating the effects of bulk and surface severe plastic deformation on the fatigue, corrosion behaviour and corrosion fatigue of AA5083

Journal

SURFACE & COATINGS TECHNOLOGY
Volume 254, Issue -, Pages 244-251

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2014.06.026

Keywords

Rotary swaging; Shot peening; Ball-burnishing; Fatigue; Corrosion resistance; Corrosion fatigue

Funding

  1. German academic exchange service (DAAD)

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This is a comparative study on the effects of bulk plastic deformation and surface-induced plastic deformation on the fatigue, corrosion behaviour and corrosion fatigue of AA5083. Bulk severe plastic deformation was performed through rotary swaging, whereas surface-induced plastic deformation was conducted by applying shot peening and ball-burnishing. Surface and near-surface properties such as surface topography, microhardness and residual compressive stresses were documented. In comparison to the as-received reference condition, results of potentiodyanmic polarization referred to a better corrosion resistance of the rotary swaged material, while both shot peening and ball-burnishing led to deterioration in corrosion resistance. It was found that, pitting corrosion occurred around Fe-rich intermetallic particles. Ball-burnishing led to superior fatigue performance in air and under corrosive environment in comparison to other investigated conditions. (C) 2014 Elsevier B.V. All rights reserved.

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