Multiscale ductile fracture integrating tomographic characterization and 3-D simulation

Stephanie Chan O'Keeffe, Shan Tang, Adrian M. Kopacz, Jacob Smith, David J. Rowenhorst, George Spanos, Wing K Liu*, Gregory B Olson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Ductile fracture in alloys is a multiscale process in which primary voids formed at micron-scale particles coalesce by a zig-zag pattern of shear localization driven by finer-scale microvoiding at submicron-scale secondary particles. Employing the method of serial sectioning, unprecedented 3-D microstructural reconstructions of steel crack-tip process zones are obtained and implemented into a large-scale simulation for ductile fracture analysis. A quantitative understanding of the microvoid sheeting mechanism and mixed-mode failure controlling the zig-zag fracture surface are presented using the modeling technique utilized herein. We define and quantify metrics of fracture by analyzing the crack opening distance, process zone size, zig-zag wavelength and void growth ratios in the crack tip reconstructions. The quantitative agreement of these metrics between experiment and simulation supports a new and developing predictive structure/property theory to enable materials design.

Original languageEnglish (US)
Pages (from-to)503-510
Number of pages8
JournalActa Materialia
Volume82
DOIs
StatePublished - Jan 1 2015

Keywords

  • 3-D characterization
  • Crack propagation
  • Ductile fracture
  • Multiscale simulations
  • Serial sectioning

ASJC Scopus subject areas

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

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