Understanding fatigue crack growth in aluminum alloys by in situ X-ray synchrotron tomography

J. J. Williams, K. E. Yazzie, E. Padilla, Nikhilesh Chawla, X. Xiao, F. De Carlo

Research output: Contribution to journalArticle

50 Scopus citations

Abstract

In situ 3D X-ray synchrotron tomography of fatigue crack growth was conducted in a 7075-T6 aluminum alloy. Local measurements of da/dN were possible with the 3D data sets obtained from tomography. In situ measurements of crack opening displacement (COD) were obtained, illustrating the possibilities for quantifying fatigue crack closure. Quantitative microstructural analysis enabled an assessment of the role of brittle inclusions on fatigue crack propagation. A significant increase in preferential crack growth through the inclusions was observed.

Original languageEnglish (US)
Pages (from-to)79-85
Number of pages7
JournalInternational Journal of Fatigue
Volume57
DOIs
StatePublished - Jan 1 2013

Keywords

  • Aluminum alloy
  • Fatigue crack growth
  • Fatigue striation
  • X-ray tomography

ASJC Scopus subject areas

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

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