Grain rotation dependent fracture toughness of nanocrystalline materials

Yingguang Liu; Jianqiu Zhou; T. D. Shen; David Hui

doi:10.1016/j.msea.2011.06.035

Grain rotation dependent fracture toughness of nanocrystalline materials

Yingguang Liu, Jianqiu Zhou, T. D. Shen, David Hui

能源科学与工程学院

科研成果: 期刊稿件 › 文章 › 同行评审

19 引用（Scopus）

摘要

A grain size dependent theoretical model is developed to describe the effect of special rotational deformation (SRD) on crack growth in deformed nanocrystalline (nc) materials. The SRD is driven by the stress concentration near the crack tip, and it serves as a toughening mechanism by releases part of the local stresses. The dependence of critical crack intensity factors on grain size was calculated. It was demonstrated that the SRD leads to an increase of critical crack intensity factors by 10-50%.

源语言	英语
页（从-至）	7684-7687
页数	4
期刊	Materials Science and Engineering: A
卷	528
期	25-26
DOI	https://doi.org/10.1016/j.msea.2011.06.035
出版状态	已出版 - 25 9月 2011

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10.1016/j.msea.2011.06.035

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author = "Yingguang Liu and Jianqiu Zhou and Shen, {T. D.} and David Hui",

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AU - Liu, Yingguang

AU - Zhou, Jianqiu

AU - Shen, T. D.

AU - Hui, David

PY - 2011/9/25

Y1 - 2011/9/25

N2 - A grain size dependent theoretical model is developed to describe the effect of special rotational deformation (SRD) on crack growth in deformed nanocrystalline (nc) materials. The SRD is driven by the stress concentration near the crack tip, and it serves as a toughening mechanism by releases part of the local stresses. The dependence of critical crack intensity factors on grain size was calculated. It was demonstrated that the SRD leads to an increase of critical crack intensity factors by 10-50%.

AB - A grain size dependent theoretical model is developed to describe the effect of special rotational deformation (SRD) on crack growth in deformed nanocrystalline (nc) materials. The SRD is driven by the stress concentration near the crack tip, and it serves as a toughening mechanism by releases part of the local stresses. The dependence of critical crack intensity factors on grain size was calculated. It was demonstrated that the SRD leads to an increase of critical crack intensity factors by 10-50%.

KW - Crack intensity factors

KW - Disclinations

KW - Nanocrystalline materials

KW - Rotational deformation

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DO - 10.1016/j.msea.2011.06.035

M3 - 文章

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VL - 528

SP - 7684

EP - 7687

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

IS - 25-26

ER -

Grain rotation dependent fracture toughness of nanocrystalline materials

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