Microstructural control of dual phase structure formed by partial reversion from cold-deformed martensite

Nobuo Nakada, Yusuke Arakawa, Kyo Sun Park, Toshihiro Tsuchiyama, Setsuo Takaki

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

1 Citation (Scopus)

Abstract

Dual phase (DP) structure formed by partial reversion from cold-deformed martensite was investigated to improve mechanical property of DP steel by grain refinement strengthening. A low carbon martensitic steel (0.15C-1.0Mn) was cold-rolled and then held just above A1 temperature to partially form austenite. In particular, the conditions of rolling reduction (0~60% reduction in thickness) and heating rate (0.083 and 100 K/s) were varied to understand their effects on the microstructural development of DP structure. Although the recrystallization has never occurred in undeformed martensite, cold-deformed martensite was more easily recrystallized before reversion with increasing rolling reduction and lowering heating rate. Then, the matrix of DP structure was changed from tempered martensite to recrystallized ferrite, which had a large influence on the distribution of fresh martensite transformed from reversed austenite. The higher rolling reduction and heating rate resulted in the finer DP structure, leading to a large improvement in strength level.

Original languageEnglish
Title of host publicationRecrystallization and Grain Growth V
Pages191-194
Number of pages4
DOIs
Publication statusPublished - Apr 29 2013
Event5th International Conference on Recrystallization and Grain Growth, ReX and GG 2013 - Sydney, NSW, Australia
Duration: May 5 2013May 10 2013

Publication series

NameMaterials Science Forum
Volume753
ISSN (Print)0255-5476

Other

Other5th International Conference on Recrystallization and Grain Growth, ReX and GG 2013
CountryAustralia
CitySydney, NSW
Period5/5/135/10/13

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Nakada, N., Arakawa, Y., Park, K. S., Tsuchiyama, T., & Takaki, S. (2013). Microstructural control of dual phase structure formed by partial reversion from cold-deformed martensite. In Recrystallization and Grain Growth V (pp. 191-194). (Materials Science Forum; Vol. 753). https://doi.org/10.4028/www.scientific.net/MSF.753.191