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

Toshihiro Doi, Makoto Tanimura, Yasumasa Koyama

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


    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
    Title of host publicationMaterials Research Society Symposium Proceedings
    Number of pages6
    Publication statusPublished - 2007
    Event2006 MRS Fall Meeting - Boston, MA, United States
    Duration: 2006 Nov 272006 Nov 30


    Other2006 MRS Fall Meeting
    CountryUnited States
    CityBoston, MA


    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials

    Cite this

    Doi, T., Tanimura, M., & Koyama, Y. (2007). Orientation relationship between the bec and σ phases in Cr-Co alloys. In Materials Research Society Symposium Proceedings (Vol. 980, pp. 475-480)