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Title: Self-interstitial atom clusters as obstacles to glide of 1/3?11 0?{1 00} edge dislocations in a-zirconium.

Abstract

Atomic-scale details of interaction of a 1/3 {l_angle}11{bar 2}0{r_angle} {l_brace}1{bar 1}00{r_brace} edge dislocation with clusters of self-interstitial atoms (SIAs) in a-zirconium has been studied by computer simulation. Four typical clusters are considered. A triangular cluster of five SIAs lying within a basal plane bisected by the dislocation glide plane is not absorbed by the dislocation but acts as a moderately strong obstacle. A 3-D SIA cluster lying across the glide plane is completely absorbed by the dislocation by creation of super-jogs, and is a weak obstacle. Interaction of the dislocation with glissile SIA loops with perfect Burgers vector inclined at 60 degrees to the dislocation glide plane shows that the process depends on the vector orientation. Defects of the two orientations are strong obstacles, and one, which initially forms a sessile segment on the dislocation line, is particularly so.

Authors:
 [1];  [2];  [1]
  1. University of Liverpool
  2. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
930710
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Materials Science and Engineering A
Additional Journal Information:
Journal Volume: 400-401
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ATOMS; BURGERS VECTOR; COMPUTERIZED SIMULATION; DEFECTS; DISLOCATIONS; EDGE DISLOCATIONS; ORIENTATION; VECTORS

Citation Formats

Voskoboinikov, Roman E, Osetskiy, Yury N, and Bacon, David J. Self-interstitial atom clusters as obstacles to glide of 1/3?11 0?{1 00} edge dislocations in a-zirconium.. United States: N. p., 2005. Web. doi:10.1016/j.msea.2005.03.056.
Voskoboinikov, Roman E, Osetskiy, Yury N, & Bacon, David J. Self-interstitial atom clusters as obstacles to glide of 1/3?11 0?{1 00} edge dislocations in a-zirconium.. United States. doi:10.1016/j.msea.2005.03.056.
Voskoboinikov, Roman E, Osetskiy, Yury N, and Bacon, David J. Sat . "Self-interstitial atom clusters as obstacles to glide of 1/3?11 0?{1 00} edge dislocations in a-zirconium.". United States. doi:10.1016/j.msea.2005.03.056.
@article{osti_930710,
title = {Self-interstitial atom clusters as obstacles to glide of 1/3?11 0?{1 00} edge dislocations in a-zirconium.},
author = {Voskoboinikov, Roman E and Osetskiy, Yury N and Bacon, David J},
abstractNote = {Atomic-scale details of interaction of a 1/3 {l_angle}11{bar 2}0{r_angle} {l_brace}1{bar 1}00{r_brace} edge dislocation with clusters of self-interstitial atoms (SIAs) in a-zirconium has been studied by computer simulation. Four typical clusters are considered. A triangular cluster of five SIAs lying within a basal plane bisected by the dislocation glide plane is not absorbed by the dislocation but acts as a moderately strong obstacle. A 3-D SIA cluster lying across the glide plane is completely absorbed by the dislocation by creation of super-jogs, and is a weak obstacle. Interaction of the dislocation with glissile SIA loops with perfect Burgers vector inclined at 60 degrees to the dislocation glide plane shows that the process depends on the vector orientation. Defects of the two orientations are strong obstacles, and one, which initially forms a sessile segment on the dislocation line, is particularly so.},
doi = {10.1016/j.msea.2005.03.056},
journal = {Materials Science and Engineering A},
number = ,
volume = 400-401,
place = {United States},
year = {2005},
month = {1}
}