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

School of energy science and engineering

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

19 Scopus citations

Abstract

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%.

Original language	English
Pages (from-to)	7684-7687
Number of pages	4
Journal	Materials Science and Engineering: A
Volume	528
Issue number	25-26
DOIs	https://doi.org/10.1016/j.msea.2011.06.035
State	Published - 25 Sep 2011

Keywords

Crack intensity factors
Disclinations
Nanocrystalline materials
Rotational deformation

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10.1016/j.msea.2011.06.035

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abstract = "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%.",

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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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U2 - 10.1016/j.msea.2011.06.035

DO - 10.1016/j.msea.2011.06.035

M3 - 文章

AN - SCOPUS:79961210777

SN - 0921-5093

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

Abstract

Keywords

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