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

Jianjun Li; Ai Kah 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
, Ai Kah Soh
, Shaohua Chen

Malaysia School of Engineering

Research output: Contribution to journal › Article › Research › 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

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10.1016/j.matlet.2014.08.136

Cite this

@article{16a2a96e49154f28b6172f13d595ee9c,

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.",

author = "Jianjun Li and Soh, \{Ai Kah\} and Shaohua Chen",

year = "2014",

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journal = "Materials Letters",

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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, Ai Kah

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.

U2 - 10.1016/j.matlet.2014.08.136

DO - 10.1016/j.matlet.2014.08.136

M3 - Article

SN - 0167-577X

VL - 137

SP - 218

EP - 220

JO - Materials Letters

JF - Materials Letters

ER -