Dislocation motion around loaded notches in ice single-crystals

被引：1
|
作者：
Cullen, D
Hu, XH
Baker, I
Dudley, M
机构：
[1] Dartmouth Coll, Thayer Sch Engn, Hanover, NH 03755 USA
[2] SUNY Stony Brook, Dept Mat Sci, Stony Brook, NY 11794 USA
来源：
COLD REGIONS SCIENCE AND TECHNOLOGY | 2000年 / 31卷 / 02期
基金：
美国国家科学基金会;
关键词：
dislocation motion; notches; ice single-crystals; dislocation-depleted zone (DDZ);
D O I：
10.1016/S0165-232X(00)00003-3
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Synchrotron X-ray topography has been used to study dislocation behavior around notches in single-crystals of ice during in-situ deformation at a constant strain-rate. During deformation at - 8 degrees C a dislocation-depleted zone (DDZ) formed above the notch while a vertical array of dislocations formed below the notch. Modeling the interaction between basal plane dislocation loops and the notch stress field suggested that this DDZ arose from dislocations gliding completely through the specimen. Dislocation activity around the notch at -8 degrees C was much greater than that observed at -40 degrees C and -60 degrees C. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：103 / 117
页数：15
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