Creep behaviour of ice single crystals loaded in torsion explained by dislocation cross-slip

Juliette Chevy; Francois Louchet; Paul Duval

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Creep behaviour of ice single crystals loaded in torsion explained by dislocation cross-slip

机译：错位错滑解释了扭转载荷下的冰单晶的蠕变行为

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Torsion creep experiments are carried out in order to understand the physics of ice plasticity. A dislocation spreading mechanism based on double cross-slip of basal dislocations is proposed to explain the strong plastic anisotropy and the power law relationship between stress and strain rates. The scenario is tested using three-dimensional dislocation dynamics simulations. Numerical investigations give a stress exponent n = 2.3 in agreement with experimental measurements. This dislocation spreading mechanism sheds a new light on the interpretation of former experimental observations.

机译：为了了解冰的可塑性，进行了扭转蠕变实验。为了解释强塑性各向异性以及应力与应变率之间的幂律关系，提出了一种基于基底位错的双重错位的位错扩展机制。该场景使用三维位错动力学模拟进行了测试。数值研究得出应力指数n = 2.3与实验测量结果一致。这种位错扩散机制为以前的实验观察的解释提供了新的思路。

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来源
《Philosophical Magazine Letters》 |2012年第6期|共8页
作者
Juliette Chevy; Francois Louchet; Paul Duval;
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原文格式 PDF
正文语种 eng
中图分类物理学;
关键词
dislocation dynamics; creep; ice; cross-slip;

机译：脱位动力学;蠕变;冰;横移;

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1. Creep behaviour of ice single crystals loaded in torsion explained by dislocation cross-slip [J] . Juliette Chevyab FranÃ§ois Louchetb Paul Duvalb amp, Marc Fivela* Philosophical Magazine Letters . 2012,第6期

机译：错位错滑解释了扭转载荷下的冰单晶的蠕变行为
2. Dislocation motion in the early stages of high-temperature low-stress creep in a single-crystal superalloy with a small lattice misfit [J] . J. X. Zhang, H. Harada, Y. Koizumi, Journal of Materials Science . 2010,第2期

机译：晶格失配小的单晶高温合金中高温低应力蠕变早期的位错运动
3. Dislocation motion in the early stages of high-temperature low-stress creep in a single-crystal superalloy with a small lattice misfit [J] . Zhang J.X., Harada H., Koizumi Y., Journal of Materials Science . 2010,第2期

机译：晶格失配小的单晶高温合金中高温低应力蠕变早期的位错运动
4. DISLOCATION PATTERNING AND DEFORMATION PROCESSES IN ICE SINGLE CRYSTALS DEFORMED BY TORSION [C] . J. Chevy, M. Montagnat, P. Duval International Conference on the Physics and Chemistry of Ice . 2007

机译：抗岩石晶体中的脱位图案化和变形过程变形
5. Similarity and scaling properties in dislocation microstructures generated during high-temperature load relaxation and creep of rock salt and San Carlos olivine single crystals (Arizona). [D] . Plookphol, Thawatchai. 2001

机译：岩盐和圣卡洛斯橄榄石单晶（亚利桑那州）的高温载荷松弛和蠕变过程中产生的位错微结构的相似性和结垢性质。
6. Room-Temperature Creep Behavior and Activation Volume of Dislocation Nucleation in a LiTaO3 Single Crystal by Nanoindentation [O] . Yi Ma, Xianwei Huang, Yuxuan Song, 2019

机译：纳米压痕法研究LiTaO3单晶的室温蠕变行为和位错成核的活化体积
7. Transmission Electron Microscope Studies on the Behaviours of Dislocations during Creep Deformation of Copper Single Crystals [O] . Tadashi Hasegawa, Hiroshi Sato, Seiichi Karashima 1970

机译：透射电子显微镜研究铜单晶蠕变变形期间位错行为
8. Microstructurally Based Cross-slip Mechanisms and Their Effects on Dislocation Microstructure Evolution in fcc Crystals. [R] . Hussein, A. M., Rao, S. I., Uchic, M. D., 2015

机译：基于微观结构的滑移机制及其对fcc晶体中位错组织演变的影响。

Creep behaviour of ice single crystals loaded in torsion explained by dislocation cross-slip

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