Crystallographic restriction in martensite and bainite transformations in steels

Goro Miyamoto, Takeshi Kaneshita, Tadachika Chiba, Tadashi Furuhara

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Attention to lath martensite and bainite in steels has been increasing due to their good mechanimcal properties. Various boundaries bewteen K-S variants contained in those microstructures contribute to their high strength and toughness so that deeper understand of nature of those boundaries is required. EBSD analyses have revealed that different variant grouping tendencies appear depending on composition and transformation temperature, such as variants belonging to the same Bain group, variants sharing the same close-packed plane parallel relationship. Kinematical compatibility (KC) condition can explain variant pairs coupled preferentially in lenticular and thin plate martensite satisfactory. In addition, it is revealed that some of the variant pairs observed in lath martensite and bainite are favorable for the KC condition when double shears are assuemd for lattice invariant shear.

Original languageEnglish
Pages (from-to)339-347
Number of pages9
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume79
Issue number7
DOIs
Publication statusPublished - 2015 Jul 1

Keywords

  • Bainite
  • Crystallography
  • Martensite
  • Steel
  • Variant

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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