Morphological instability of δ-ferrite/γ-austenite interphase boundary in low carbon steels

H. Yin, T. Emi, H. Shibata

Research output: Contribution to journalArticle

109 Citations (Scopus)

Abstract

The dynamic behavior of the δ-ferrite/γ-austenite interphase boundary during δ/γ transformations was observed in situ with a confocal scanning laser microscope. The morphological instability and the growth of the finger pattern of the δ/γ interphase boundary were mainly focused on and studied in this work. It was found that the incoherent δ/γ interphase boundaries were always unstable with finger-like morphology during δ→γ transformation, which developed along δ-GBs at low supercoolings (<7 K) and even into the δ-matrix at higher supercoolings for the transformation. At the same time, the finger spacing was measured and analyzed by using the classical constitutional supercooling and instability theories, which show good agreement between the observations and theories.

Original languageEnglish
Pages (from-to)1523-1535
Number of pages13
JournalActa Materialia
Volume47
Issue number5
DOIs
Publication statusPublished - 1999 Mar 31

ASJC Scopus subject areas

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

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