Crystallographic analysis of grain boundary Bcc-precipitates in a Ni-Cr alloy by FESEM/EBSD and TEM/Kikuchi line methods

Yoshitaka Adachi, Kazunari Hakata, Kaneaki Tsuzaki

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Variant selection of intergranular bcc-Cr precipitates in a Ni-43 mass% Cr alloy was studied by electron backscattering diffraction (EBSD) in a scanning electron microscope equipped with a field emission gun (FESEM) and Kikuchi line analysis in transmission electron microscope (TEM). A single variant was invariably selected at the underlying grain boundaries (GB) when GB-precipitates were KS-related with respect to both the adjacent matrix grains. Meanwhile multiple variants were formed at the GB when GB-precipitates were KS-related to one of the adjacent matrix grains. Theses variant selections were examined with the tilt angle to underlying GB of low-energy interphase boundaries and the orientation relationship with respect to both the adjacent matrix grains. The underlying mechanism was discussed from the viewpoint of activation energy for nucleation of two-dimensional nuclei.

Original languageEnglish
Pages (from-to)252-263
Number of pages12
JournalMaterials Science and Engineering A
Volume412
Issue number1-2
DOIs
Publication statusPublished - Dec 5 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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