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Title: Grain boundary kinetics: 2, In-situ observations of the role of grain boundary dislocations in high-angle boundary migration

Abstract

The capillarity-induced motion of near-..sigma..5 grain boundaries in Au was directly observed and video-recorded by means of hot-stage in-situ transmission electron microscopy. The observed boundary motion differed from the boundary ''displacement'' caused by the stress-induced passage of secondary grain boundary dislocation (SGBD)-steps along the boundary which was studied in Part I of this work in the following respects. It occurred in a jerky fashion, no translation of one abutting crystal with respect to the other was observed, and quantitative evidence proved that SGBDs were not involved. These results ruled out the SGBD-Step Model for the observed motion which was identified as common long-range boundary migration. In-situ observations of the migration of more general high-angle boundaries in polycrystalline Al films revealed similar jerky motion and an apparent lack of any significant contribution to migration by observed SGBDs. 26 refs., 7 figs.

Authors:
;
Publication Date:
Research Org.:
Massachusetts Inst. of Tech., Cambridge (USA). Dept. of Materials Science and Engineering
OSTI Identifier:
6486281
Report Number(s):
DOE/ER/45310-16
ON: DE89006791
DOE Contract Number:  
FG02-87ER45310
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM; GRAIN BOUNDARIES; GOLD; ATOMS; DISLOCATIONS; KINETICS; MICROSTRUCTURE; MIGRATION; MOTION; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; ELEMENTS; LINE DEFECTS; METALS; TRANSITION ELEMENTS; 360102* - Metals & Alloys- Structure & Phase Studies

Citation Formats

Babcock, S E, and Balluffi, R W. Grain boundary kinetics: 2, In-situ observations of the role of grain boundary dislocations in high-angle boundary migration. United States: N. p., 1989. Web.
Babcock, S E, & Balluffi, R W. Grain boundary kinetics: 2, In-situ observations of the role of grain boundary dislocations in high-angle boundary migration. United States.
Babcock, S E, and Balluffi, R W. 1989. "Grain boundary kinetics: 2, In-situ observations of the role of grain boundary dislocations in high-angle boundary migration". United States.
@article{osti_6486281,
title = {Grain boundary kinetics: 2, In-situ observations of the role of grain boundary dislocations in high-angle boundary migration},
author = {Babcock, S E and Balluffi, R W},
abstractNote = {The capillarity-induced motion of near-..sigma..5 grain boundaries in Au was directly observed and video-recorded by means of hot-stage in-situ transmission electron microscopy. The observed boundary motion differed from the boundary ''displacement'' caused by the stress-induced passage of secondary grain boundary dislocation (SGBD)-steps along the boundary which was studied in Part I of this work in the following respects. It occurred in a jerky fashion, no translation of one abutting crystal with respect to the other was observed, and quantitative evidence proved that SGBDs were not involved. These results ruled out the SGBD-Step Model for the observed motion which was identified as common long-range boundary migration. In-situ observations of the migration of more general high-angle boundaries in polycrystalline Al films revealed similar jerky motion and an apparent lack of any significant contribution to migration by observed SGBDs. 26 refs., 7 figs.},
doi = {},
url = {https://www.osti.gov/biblio/6486281}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}

Technical Report:
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