Effect of pearlite structure on lattice strain in ferrite estimated by the williamson-hall method

Yuki Tanaka, Daichi Akama, Nobuo Nakada, Toshihiro Tsuchiyama, Setsuo Takaki

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The effect of pearlite on the X-ray diffraction peak reflected from ferrite phase in ferrite-pearlite steel was investigated using normalized carbon steels with different volume fraction of pearlite and a hypereutectoid steel with various pearlite lamellar spacing. The lattice strain in ferrite phase, which causes the broadening of X-ray diffraction peak, was increased in proportion to both of the volume fraction of pearlite and the inverse of pearlite lamellar spacing. As a result, the lattice strain in ferrite-pearlite steel can be simply formulated as functions of them. On the other hand, TEM observation reveals that pearlite has low-density dislocation in ferrite phase. This result suggests that the misfit between ferrite and cementite in pearlite generates the significant amount of elastic strain, which leads to the increasing in lattice strain. Therefore, the dislocation density must be overestimated in carbon steels with pearlite, if it is estimated from the experimental lattice strain directly.

Original languageEnglish
Pages (from-to)1229-1231
Number of pages3
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume100
Issue number10
DOIs
Publication statusPublished - Jan 1 2014

All Science Journal Classification (ASJC) codes

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

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