Continuous dynamic recrystallization during warm deformation of tempered lath martensite in a medium carbon steel

Un Hae Lee, Naoya Kamikawa, Goro Miyamoto, Tadashi Furuhara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

To understand the mechanisms of accelerated dynamic recrystallization behavior during the warm deformation of martensites, the tempered lath martensite of 0.4C steel (Fe-0.399%C-1.96%Mn in mass %) was deformed at 650°C in compression to different reductions, and microstructural evolution was investigated. During the deformation, an initial lath martensite structure with a complicated morphology was gradually changed into more equiaxed structure. After 50% reduction and above, an equiaxed, fine grained structure mainly surrounded by high-angle boundaries was uniformly formed with dislocation substructures, where the dislocation density in the grains is relatively low. Since there was no significant boundary migration during this process, this microstructural evolution can be termed as continuous dynamic recrystallization.

Original languageEnglish
Title of host publicationMaterials Integration
PublisherTrans Tech Publications Ltd
Pages124-127
Number of pages4
ISBN (Print)9783037853764
DOIs
Publication statusPublished - 2012
EventInt. Symposium of GCOE: Materials Integration, in Conjunction with the 2nd Int. Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2011 and the 8th Materials Science School for Young Scientists, KINKEN-WAKATE 2011 - Sendai, Japan
Duration: 2011 Dec 12011 Dec 2

Publication series

NameKey Engineering Materials
Volume508
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Other

OtherInt. Symposium of GCOE: Materials Integration, in Conjunction with the 2nd Int. Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2011 and the 8th Materials Science School for Young Scientists, KINKEN-WAKATE 2011
CountryJapan
CitySendai
Period11/12/111/12/2

Keywords

  • Dynamic recrystallization
  • Grain refinement
  • Lath martensite
  • Warm deformation

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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