A coupling crack blunting mechanism in nanocrystalline materials by nano-grain rotation and shear-coupled migration of grain boundaries

Jianjun Li; A. K. Soh; Shaohua Chen

doi:10.1016/j.matlet.2014.08.136

A coupling crack blunting mechanism in nanocrystalline materials by nano-grain rotation and shear-coupled migration of grain boundaries

Jianjun Li^*
, A. K. Soh
, Shaohua Chen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

A theoretical model has been developed to investigate the effect of a special cooperative process between two main modes of stress-driven nano-grain growth, i.e., nano-grain rotation and shear-coupled migration of grain boundaries, on the emission of lattice dislocations from a semi-infinite crack in nanocrystalline materials. The results obtained show that the above-mentioned collaborative process is highly conducive to the process of dislocation emission, thus, rendering strong crack blunting in nanocrystalline materials.

Original language	English
Pages (from-to)	218-220
Number of pages	3
Journal	Materials Letters
Volume	137
DOIs	https://doi.org/10.1016/j.matlet.2014.08.136
Publication status	Published - 15 Dec 2014
Externally published	Yes

Keywords

Cracks
Dislocation emission
Nano-grain rotation
Nanocrystalline materials
Shear-coupled migration of grain boundaries
Simulation and modelling

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10.1016/j.matlet.2014.08.136

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@article{27137158bd2b489d95055546523f5504,

title = "A coupling crack blunting mechanism in nanocrystalline materials by nano-grain rotation and shear-coupled migration of grain boundaries",

abstract = "A theoretical model has been developed to investigate the effect of a special cooperative process between two main modes of stress-driven nano-grain growth, i.e., nano-grain rotation and shear-coupled migration of grain boundaries, on the emission of lattice dislocations from a semi-infinite crack in nanocrystalline materials. The results obtained show that the above-mentioned collaborative process is highly conducive to the process of dislocation emission, thus, rendering strong crack blunting in nanocrystalline materials.",

keywords = "Cracks, Dislocation emission, Nano-grain rotation, Nanocrystalline materials, Shear-coupled migration of grain boundaries, Simulation and modelling",

author = "Jianjun Li and Soh, \{A. K.\} and Shaohua Chen",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

year = "2014",

month = dec,

day = "15",

doi = "10.1016/j.matlet.2014.08.136",

language = "English",

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journal = "Materials Letters",

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TY - JOUR

T1 - A coupling crack blunting mechanism in nanocrystalline materials by nano-grain rotation and shear-coupled migration of grain boundaries

AU - Li, Jianjun

AU - Soh, A. K.

AU - Chen, Shaohua

PY - 2014/12/15

Y1 - 2014/12/15

N2 - A theoretical model has been developed to investigate the effect of a special cooperative process between two main modes of stress-driven nano-grain growth, i.e., nano-grain rotation and shear-coupled migration of grain boundaries, on the emission of lattice dislocations from a semi-infinite crack in nanocrystalline materials. The results obtained show that the above-mentioned collaborative process is highly conducive to the process of dislocation emission, thus, rendering strong crack blunting in nanocrystalline materials.

AB - A theoretical model has been developed to investigate the effect of a special cooperative process between two main modes of stress-driven nano-grain growth, i.e., nano-grain rotation and shear-coupled migration of grain boundaries, on the emission of lattice dislocations from a semi-infinite crack in nanocrystalline materials. The results obtained show that the above-mentioned collaborative process is highly conducive to the process of dislocation emission, thus, rendering strong crack blunting in nanocrystalline materials.

KW - Cracks

KW - Dislocation emission

KW - Nano-grain rotation

KW - Nanocrystalline materials

KW - Shear-coupled migration of grain boundaries

KW - Simulation and modelling

UR - https://www.scopus.com/pages/publications/84907549460

U2 - 10.1016/j.matlet.2014.08.136

DO - 10.1016/j.matlet.2014.08.136

M3 - Article

AN - SCOPUS:84907549460

SN - 0167-577X

VL - 137

SP - 218

EP - 220

JO - Materials Letters

JF - Materials Letters

ER -

A coupling crack blunting mechanism in nanocrystalline materials by nano-grain rotation and shear-coupled migration of grain boundaries

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Keywords

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