Fatigue and fracture behaviour of structural Al-alloys up to very long life regimes

Q. Y. Wang, N. Kawagoishi, Q. Chen

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)

Abstract

Very long life fatigue and near-threshold fatigue crack growth behaviour of 7075 and 6061 Al-alloys in T6 condition were investigated using accelerated fatigue testing at 19.5 kHz on a piezoelectric machine. Significant interfacial voids were observed in the two Al-alloys during crack initiation and early fatigue crack growth process. Fatigue failure in Al-alloys could be ascribed to: the formation of a number of fatigue voids, their growth and coalescence, and the subsequent formation and propagation of macroscopic cracks. Moreover, fatigue crack growth rates of small cracks in these alloys were found to be greater than those of large cracks for the same stress intensity factor range.

Original languageEnglish
Pages (from-to)1572-1576
Number of pages5
JournalInternational Journal of Fatigue
Volume28
Issue number11
DOIs
Publication statusPublished - Nov 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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