A study of the effects of particle 3-dimensional geometry and micro-texture on fatigue crack initiation behaviors in an Al-Cu alloy using focused ion beam and electron backscatter diffraction

Wei Wen, Alfonso H.W. Ngan, Yuanbin Zhang, Bin Xu, Tongguang Zhai

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Multiple cracks were generated from surface particles in an Al-Cu alloy in four-point bend fatigue. These cracks mostly became non-propagating at or shortly beyond the particle/matrix interface on the surface. Cross-sectioning using focused ion beam revealed that the 3-dimensional geometry, especially the thickness, of fractured particles was the key factor controlling the driving force for micro-crack growth. The resistance to micro-crack growth was mainly associated with crack plane twist at the particle/matrix interface, as revealed by electron backscatter diffraction measurement.

Original languageEnglish
Pages (from-to)97-101
Number of pages5
JournalMaterials Science and Engineering: A
Volume564
DOIs
StatePublished - Mar 1 2013

Keywords

  • EBSD
  • FIB
  • Fatigue crack initiation
  • Particle three-dimensions
  • Texture

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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