A 3D measurement procedure for internal local crack driving forces via synchrotron X-ray microtomography

H. Toda, I. Sinclair, J. Y. Buffière, E. Maire, K. H. Khor, P. Gregson, T. Kobayashi

Research output: Contribution to journalArticlepeer-review

174 Citations (Scopus)

Abstract

Synchrotron X-ray microtomography has been utilized for the in situ observation of fatigue crack opening/closure during load cycles. High-resolution phase contrast imaging technique has enabled the reconstruction of clear crack images together with the details of microstructural features. Physical displacements of micro-pores in a crack-tip stress field are used to obtain local mixed-mode crack driving forces along a crack front, and its feasibility is confirmed. Complicated crack closure behaviour are observed due to the combined effects of local modes II and III displacements. The technique used provides a highly effective way of assessing local crack driving forces together with supplementary ways of verifying and interpreting it by visualising and quantifying various forms of crack-tip shielding behaviour. The proposed technique is clearly advantageous compared to the limited procedures available in the current literature, where detailed internal information can only be achieved for limited types of material.

Original languageEnglish
Pages (from-to)1305-1317
Number of pages13
JournalActa Materialia
Volume52
Issue number5
DOIs
Publication statusPublished - Mar 8 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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