Advertisement

Journal of Materials Science

, Volume 26, Issue 5, pp 1375–1382 | Cite as

A study of corrosion fatigue behaviour of anodized and unanodized 2024-T3 aluminium alloy

  • G. C. Tu
  • R. Y. Hwang
  • I. T. Chen
Papers

Abstract

The corrosion fatigue (CF) behaviour, under constant deflection bending conditions with a pulsating tension stress form, of 2024-T3 aluminium alloy, unanodized and anodized to form a thick porous film, in 3.5% NaCl solution has been investigated. It was found that Ecorr varies very little until specimen fracture under low frequency CF conditions, whereas Ecorr drops rapidly when approaching the later fracturing stage of the CF process under high-frequency conditions for unanodized specimens. However, a slow drop in Ecorr was detected from the commencement of the CF process, and lasted up to a much more rapid drop at a later fracturing stage for the anodized specimen. This behaviour presumably can be explained by the cracking of the anodic film and the theory of imperfect recovery of the surface film. It is suggested that the Ecorr monitoring technique may be useful for determining the remnant CF life for existing structural parts of this alloy or other aluminium alloys regardless of whether or not they are anodized. Furthermore, the T3 temper provides a microstructure which may retard main-crack formation and penetration in the CF process of the anodized alloy, thus mitigating partly the negative effect of the readily crackable anodic film.

Keywords

Aluminium Alloy Fatigue Behaviour Corrosion Fatigue Tension Stress Porous Film 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    G. W. Stickley and J. O. Lyst, J. Mater. 1 (1966) 19.Google Scholar
  2. 2.
    G. A. Beital and C. Q. Bowles, Met. Sci. J. 5 (1971) 85.CrossRefGoogle Scholar
  3. 3.
    G. C. Tu and L. Y. Huang, Trans. Inst. Met. Fin. 65 (1987) 60.CrossRefGoogle Scholar
  4. 4.
    K. Endo and K. Komai, “Corrosion Fatigue”, edited by O. Devereux, A. J. McElivy and R. W. Staehle (National Association of Corrosion Engineers, Houston, USA, 1972) p. 437.Google Scholar
  5. 5.
    R. W. Hertzberg, in “Deformation and Fracture Mechanics of Engineering Materials”, 3rd Edn (Wiley, New York, 1989) p. 361.Google Scholar

Copyright information

© Chapman and Hall Ltd. 1991

Authors and Affiliations

  • G. C. Tu
    • 1
  • R. Y. Hwang
    • 1
  • I. T. Chen
    • 1
  1. 1.Department of Mechanical EngineeringNational Chiao Tung UniversityHsinchuTaiwan

Personalised recommendations