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

27 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

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Backscattering
Precipitates
precipitates
backscattering
Grain boundaries
Electron microscopes
grain boundaries
electron microscopes
Diffraction
Electrons
diffraction
electrons
matrices
theses
Crystal orientation
Field emission
field emission
Nucleation
Activation energy
nucleation

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Crystallographic analysis of grain boundary Bcc-precipitates in a Ni-Cr alloy by FESEM/EBSD and TEM/Kikuchi line methods. / Adachi, Yoshitaka; Hakata, Kazunari; Tsuzaki, Kaneaki.

In: Materials Science and Engineering A, Vol. 412, No. 1-2, 05.12.2005, p. 252-263.

Research output: Contribution to journalArticle

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