Evaluation of dislocation density in cold worked low carbon ferritic steel

Setsuo Takaki, Takuro Masumura, Fulin Jiang, Toshihiro Tsuchiyama

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5 Citations (Scopus)

Abstract

Synopsis: A low carbon ferritic steel (Fe-0.0056%C) was used for the estimation of dislocation density. Annealed steel sheet with the ferrite grain size of 50 μm was subjected to cold rolling up to 80% thickness reduction and then provided to the X-ray diffraction analysis. Dislocation density was evaluated by the Modified Williamson-Hall / Warren-Averbach method. It was confirmed in cold rolled specimens that the equation; σy [GPa] = 0.05+18√ρ/109 stands up in the relation between yield stress ρy and dislocation density ρ [m-2]. On the other hand, the values of parameter π in the Modified Williamson-Hall equation were accurately estimated in each cold rolled specimen and it was found that the equation ρ[m-2] = 4.5×1019π2 stands up between π and ρ. In addition, it is suggested that the screw dislocation component decreases with cold rolling and, in specimens with cold rolling more than 40%, dislocations are of almost full edge dislocation.

Original languageEnglish
Pages (from-to)683-688
Number of pages6
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume104
Issue number11
DOIs
Publication statusPublished - Nov 2018

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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