Tensile deformation behavior of Fe-Mn-C TWIP steel with ultrafine elongated grain structure

Taekyung Lee, Motomichi Koyama, Kaneaki Tsuzaki, You Hwan Lee, Chong Soo Lee

Research output: Contribution to journalArticlepeer-review

65 Citations (Scopus)

Abstract

An Fe-17Mn-0.6C steel with ultrafine elongated grain structure was successfully produced utilizing a multi-pass caliber-rolling process at 773 K. The uniform elongation of the developed steel was not severely degraded although its strength was greatly enhanced, leading to superior tensile properties. The result contrasted with most ultrafine-grained metals, including C-free TWIP steels, reporting the critical loss of uniform elongation. The peculiar phenomenon in the present work was attributed to the high work hardening capacity of C-added TWIP steels with the submicrocrystalline structure caused by dynamic strain aging, deformation twinning, and formation of stacking faults even after strong grain refinement.

Original languageEnglish
Pages (from-to)169-171
Number of pages3
JournalMaterials Letters
Volume75
DOIs
Publication statusPublished - 2012 May 15
Externally publishedYes

Keywords

  • Deformation twinning
  • Dynamic strain aging
  • Grain refinement
  • TWIP steel
  • Tensile properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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