Interphase boundary structures of lath martensite and bainite in steel

T. Furuhara, N. Miyajima, T. Moritani, T. Maki

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

Interphase boundary structures of lath martensite and bainite formed in austenite were examined by means of conventional and high-resolution transmission electron microscopy. Orientation relationships of the isothermal lath martensite in Fe-20Ni-5.5Mn and of the bainitic ferrite in Fe-2Si-1Mn-0.6C are both slightly scattered in the vicinity of K-S, N and G-T relationships with respect to austenite. The broad face of martensite lath contains transformation dislocations (monoatomic steps with the (111)fcc//(011)bcc terrace). Two kinds of accommodation dislocations exist alternately on every three layers of the parallel close packed planes, in a glissile arrangement. Such dislocations can fully accomodate the shear component of transformation strain. It is found that the atomic structure of bainitic ferrite/austenite interphase boundary is similar to that of lath martensite.

Original languageEnglish
Pages (from-to)319-322
Number of pages4
JournalJournal De Physique. IV : JP
Volume112 I
DOIs
Publication statusPublished - 2003 Oct
Externally publishedYes
EventInternational Conference on Martensitic Transformations - Espoo, Finland
Duration: 2002 Jun 102002 Jun 14

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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