1. Crystallographic analysis of grain boundary Bcc-precipitates in a Ni–Cr alloy by FESEM/EBSD and TEM/Kikuchi line methods
- Author
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Adachi, Yoshitaka, Hakata, Kazunari, and Tsuzaki, Kaneaki
- Subjects
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CRYSTALLOGRAPHY , *CRYSTAL grain boundaries , *ALLOYS , *SCANNING electron microscopes - Abstract
Abstract: Variant selection of intergranular bcc-Cr precipitates in a Ni–43mass% 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. [Copyright &y& Elsevier]
- Published
- 2005
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