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Title: Observation of a grain boundary phase transformation induced by solute segregation

Abstract

Comparisons were made of the defect structures present in low angle Fe twist boundaries in the absence and in the presence of Au solute. Samples for this study were prepared by sintering together epitaxial Fe--Au dilute alloy thin films, grown by electron beam vapor deposition. Rutherford backscattering spectrometry (RBS) measurements showed that the Au solute was concentrated in the vicinity of the grain boundaries in this study. Transmission electron microscopy observations showed that the Au solute segregated at the boundary induces a transformation in the grain boundary dislocation (GBD) structure from a <110>-oriented GBD network, to a <100>-oriented GBD network. Analytical electron microscopy showed that the grain boundary regions containing the <100>-GBD networks were substantially richer in Au than the regions containing the <110>-GBD networks. These results are evidence for the occurrence of a two-dimensional phase transformation at the grain boundary.

Authors:
;
Publication Date:
Research Org.:
Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853
OSTI Identifier:
5673485
Resource Type:
Journal Article
Journal Name:
J. Vac. Sci. Technol., A; (United States)
Additional Journal Information:
Journal Volume: 3:3
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; GOLD; SEGREGATION; GOLD ALLOYS; CRYSTAL DEFECTS; GRAIN BOUNDARIES; PHASE TRANSFORMATIONS; SOLVENT PROPERTIES; IRON ALLOYS; BACKSCATTERING; DISLOCATIONS; EPITAXY; IRON; SINTERING; SOLUTES; TRANSMISSION ELECTRON MICROSCOPY; ALLOYS; CRYSTAL STRUCTURE; ELECTRON MICROSCOPY; ELEMENTS; FABRICATION; LINE DEFECTS; METALS; MICROSCOPY; MICROSTRUCTURE; SCATTERING; TRANSITION ELEMENTS; 360102* - Metals & Alloys- Structure & Phase Studies

Citation Formats

Sickafus, K, and Sass, S L. Observation of a grain boundary phase transformation induced by solute segregation. United States: N. p., 1985. Web. doi:10.1116/1.573156.
Sickafus, K, & Sass, S L. Observation of a grain boundary phase transformation induced by solute segregation. United States. doi:10.1116/1.573156.
Sickafus, K, and Sass, S L. Wed . "Observation of a grain boundary phase transformation induced by solute segregation". United States. doi:10.1116/1.573156.
@article{osti_5673485,
title = {Observation of a grain boundary phase transformation induced by solute segregation},
author = {Sickafus, K and Sass, S L},
abstractNote = {Comparisons were made of the defect structures present in low angle Fe twist boundaries in the absence and in the presence of Au solute. Samples for this study were prepared by sintering together epitaxial Fe--Au dilute alloy thin films, grown by electron beam vapor deposition. Rutherford backscattering spectrometry (RBS) measurements showed that the Au solute was concentrated in the vicinity of the grain boundaries in this study. Transmission electron microscopy observations showed that the Au solute segregated at the boundary induces a transformation in the grain boundary dislocation (GBD) structure from a <110>-oriented GBD network, to a <100>-oriented GBD network. Analytical electron microscopy showed that the grain boundary regions containing the <100>-GBD networks were substantially richer in Au than the regions containing the <110>-GBD networks. These results are evidence for the occurrence of a two-dimensional phase transformation at the grain boundary.},
doi = {10.1116/1.573156},
journal = {J. Vac. Sci. Technol., A; (United States)},
number = ,
volume = 3:3,
place = {United States},
year = {1985},
month = {5}
}