Variant selection of lath martensite and bainite transformation in low carbon steel by ausforming

Goro Miyamoto, Naomichi Iwata, Naoki Takayama, Tadashi Furuhara

研究成果: Article査読

33 被引用数 (Scopus)

抄録

Variant selection of lath martensite and bainite transformed in an ausformed low-alloy low-carbon steel is analyzed quantitatively by applying reconstruction method of austenite orientation. It was found that transformation texture having {1 1 1}α and {0 1 1}α along compression axis is developed by ausforming both in martensite and bainite transformation. Development of such texture can be explained qualitatively from deformation texture in austenite without taking variant selection into account. However, their intensities cannot be reproduced quantitatively, indicating that specific variants are favorably selected by ausforming. Quantitative analyses of variant fractions revealed that martensite variants whose habit planes are nearly parallel to the primary and secondary slip planes in austenite are formed preferentially. Similar variant selection rule is observed in ausformed bainite while it is not as strong as in ausformed martensite. A preferential nucleation model is proposed for variant selection by ausforming in which variants with habit planes nearly parallel to the primary or secondary slip planes in austenite are nucleated on the microband boundaries in austenite introduced by compression.

本文言語English
ページ(範囲)S528-S532
ジャーナルJournal of Alloys and Compounds
577
SUPPL. 1
DOI
出版ステータスPublished - 2013 11 15

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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