Orientation relationship between the bec and σ phases in Cr-Co alloys

Toshihiro Doi*, Makoto Tanimura, Yasumasa Koyama

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


To obtain deeper understanding of the σ structure, the formation of the σ structure in the (bcc→bcc+σ) reaction at 873K and 1173K have been investigated by transmission electron microscopy. As for the orientation relationship between the bcc and σ structures, as a result, both the common first relation of [110]bcc//[100]σ and three second relations given by α=0°, 33°, and 64° were found for the 1173K annealing, where α is an angle between the [1l0] bcc and [001]σ directions. For the 873K annealing, on the other hand, there was only one second relation with α=0°. Based on the α=0° relation found for both annealing temperatures, the features of atomic shifts in the σ-structure formation from the bcc structure were also discussed.

Original languageEnglish
Pages (from-to)475-480
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Publication statusPublished - 2007 Jun 29
Event2006 MRS Fall Meeting - Boston, MA, United States
Duration: 2006 Nov 272006 Nov 30

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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