Strain hardening behavior of aluminum alloyed Hadfield steel single crystals

D. Canadinc, H. Sehitoglu, H. J. Maier, Y. I. Chumlyakov

Research output: Contribution to journalArticlepeer-review

Abstract

Very high strain hardening coefficients (=G/23) are observed for aluminum-alloyed face-centered cubic Hadfield steel single crystals under tensile loading. Alloying with aluminum suppressed deformation twinning in two of the three crystallographic orientations studied, and transmission electron microscopy results revealed the existence of dense dislocation walls (sheets) along crystallographic directions that form barriers to slip deformation. A visco-plastic self-consistent algorithm was modified to account for the interaction between the active slip systems and the high density dislocation walls, producing close prediction of the experimental strain hardening response. The model predicted the added hardening in single crystals deformed along [1̄11], [0 0 1] compared to the [1̄23] orientation, the increase in volume fraction of the dislocation walls with increased deformation and the role of twinning in the [1 2 3] orientation.

Original languageEnglish (US)
Pages (from-to)1831-1842
Number of pages12
JournalActa Materialia
Volume53
Issue number6
DOIs
StatePublished - Apr 2005

Keywords

  • Crystal plasticity
  • Dislocation walls
  • Hadfield steel
  • Microstructure
  • Strain hardening

ASJC Scopus subject areas

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

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