IN-SITU OBSERVATION OF ACICULAR FERRITE TRANSFORMATION IN HIGH-STRENGTH LOW-ALLOY STEEL USING CONFOCAL LASER SCANNING MICROSCOPY

Sang In Lee, Seung Hyeok Shin, Hyeonwoo Park, Hansoo Kim, Joonho Lee, Byoungchul Hwang

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

In-situ observation of the transformation behavior of acicular ferrite in high-strength low-alloy steel using confocal laser scanning microscopy was discussed in terms of nucleation and growth. It is found that acicular ferrite nucleated at dislocations and slip bands in deformed austenite grains introduced by hot deformation in the non-recrystallization austenite region, and then proceeded to grow into an austenite grain boundary. According to an ex-situ EBSD analysis, acicular ferrite had an irregular shape morphology, finer grains with sub-grain boundaries, and higher strain values than those of polygonal ferrite. The fraction of acicular ferrite was affected by the deformation condition and increased with increasing the amount of hot deformation in the non-recrystallization austenite region.

Original languageEnglish
Pages (from-to)1497-1501
Number of pages5
JournalArchives of Metallurgy and Materials
Volume67
Issue number4
DOIs
Publication statusPublished - 2022

Bibliographical note

Publisher Copyright:
© 2022. The Author(s).

Keywords

  • acicular ferrite
  • confocal laser scanning microscopy (CLSM)
  • high-strength low-alloy steel
  • phase transformation, in-situ observation

ASJC Scopus subject areas

  • Metals and Alloys

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