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Title: Primary and secondary grain boundary dislocations in symmetric tilt grain boundaries of finite length

Abstract

Secondary grain boundary dislocations in large-angle grain boundaries (also called dsc-dislocations) can be described as local variations in the density of the primary (or lattice) dislocations that make up the boundary. The authors present a simple meso-scale simulation in which the interactions of primary dislocations with each other and with the crystal lattice produce secondary dislocations with smaller Burgers vectors and larger spacing. They use the model to explore the interactions of the primary and secondary defects with a free surface terminating the grain boundary, and demonstrate cases in which the primary dislocations dominate the interactions, forcing the secondary dislocations to increase their energy. Other cases are found, for which all of the dislocations can respond in such a way that their energy decreases. The creation of interfacial disclinations is also demonstrated.

Authors:
;
Publication Date:
Research Org.:
State Univ. of New York, Stony Brook, NY (US)
Sponsoring Org.:
National Science Foundation (NSF)
OSTI Identifier:
20015010
Resource Type:
Conference
Resource Relation:
Conference: Multiscale Modeling of Materials, Boston, MA (US), 11/30/1998--12/03/1998; Other Information: Single article reprints are available through University Microfilms Inc., 300 North Zeeb Rd., Ann Arbor, Michigan 48106 (US); PBD: 1999; Related Information: In: Multiscale modeling of materials. Materials Research Society symposium proceedings: Volume 538, by Bulatov, V.V.; Diaz de la Rubia, T.; Phillips, R.; Kaxiras, E.; Ghoniem, N. [eds.], 607 pages.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; GRAIN BOUNDARIES; MATERIALS; DISLOCATIONS; COMPUTERIZED SIMULATION; BURGERS VECTOR; GRAIN ORIENTATION; THEORETICAL DATA

Citation Formats

Lakshmanan, A, and King, A H. Primary and secondary grain boundary dislocations in symmetric tilt grain boundaries of finite length. United States: N. p., 1999. Web.
Lakshmanan, A, & King, A H. Primary and secondary grain boundary dislocations in symmetric tilt grain boundaries of finite length. United States.
Lakshmanan, A, and King, A H. Thu . "Primary and secondary grain boundary dislocations in symmetric tilt grain boundaries of finite length". United States.
@article{osti_20015010,
title = {Primary and secondary grain boundary dislocations in symmetric tilt grain boundaries of finite length},
author = {Lakshmanan, A and King, A H},
abstractNote = {Secondary grain boundary dislocations in large-angle grain boundaries (also called dsc-dislocations) can be described as local variations in the density of the primary (or lattice) dislocations that make up the boundary. The authors present a simple meso-scale simulation in which the interactions of primary dislocations with each other and with the crystal lattice produce secondary dislocations with smaller Burgers vectors and larger spacing. They use the model to explore the interactions of the primary and secondary defects with a free surface terminating the grain boundary, and demonstrate cases in which the primary dislocations dominate the interactions, forcing the secondary dislocations to increase their energy. Other cases are found, for which all of the dislocations can respond in such a way that their energy decreases. The creation of interfacial disclinations is also demonstrated.},
doi = {},
url = {https://www.osti.gov/biblio/20015010}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {7}
}

Conference:
Other availability
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