An energy approach to account for crack initiation in nanocrystalline materials

Jianqiu Zhou; Lingling Hu; Hongxi Liu; Menghan Hu

doi:10.1016/j.matdes.2013.05.044

An energy approach to account for crack initiation in nanocrystalline materials

Jianqiu Zhou, Lingling Hu, Hongxi Liu, Menghan Hu

School of energy science and engineering

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

6 Scopus citations

Abstract

An energy balance method to calculate the initiation of crack at triple junctions in nanocrystalline materials with the finest grains is developed. In the steady state of crack initiation, work done by an applied stress is considered to be dissipated as heat by specific rotational deformation, grain boundary sliding and diffusion. The stress field at crack tips, the energies of rotational deformation, grain boundary sliding and grain boundary diffusion are calculated. The analysis demonstrates that the existence of finest grains will lead to enhanced local fracture toughness.

Original language	English
Pages (from-to)	30-35
Number of pages	6
Journal	Materials and Design
Volume	52
Issue number	4
DOIs	https://doi.org/10.1016/j.matdes.2013.05.044 https://doi.org/10.11776/cjam.30.04.B079
State	Published - Dec 2013

Keywords

Crack initiation
Energy methods
Finest grains
Nanocrystalline materials

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abstract = "An energy balance method to calculate the initiation of crack at triple junctions in nanocrystalline materials with the finest grains is developed. In the steady state of crack initiation, work done by an applied stress is considered to be dissipated as heat by specific rotational deformation, grain boundary sliding and diffusion. The stress field at crack tips, the energies of rotational deformation, grain boundary sliding and grain boundary diffusion are calculated. The analysis demonstrates that the existence of finest grains will lead to enhanced local fracture toughness.",

keywords = "Crack initiation, Energy methods, Finest grains, Nanocrystalline materials",

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AU - Zhou, Jianqiu

AU - Hu, Lingling

AU - Liu, Hongxi

AU - Hu, Menghan

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Y1 - 2013/12

N2 - An energy balance method to calculate the initiation of crack at triple junctions in nanocrystalline materials with the finest grains is developed. In the steady state of crack initiation, work done by an applied stress is considered to be dissipated as heat by specific rotational deformation, grain boundary sliding and diffusion. The stress field at crack tips, the energies of rotational deformation, grain boundary sliding and grain boundary diffusion are calculated. The analysis demonstrates that the existence of finest grains will lead to enhanced local fracture toughness.

AB - An energy balance method to calculate the initiation of crack at triple junctions in nanocrystalline materials with the finest grains is developed. In the steady state of crack initiation, work done by an applied stress is considered to be dissipated as heat by specific rotational deformation, grain boundary sliding and diffusion. The stress field at crack tips, the energies of rotational deformation, grain boundary sliding and grain boundary diffusion are calculated. The analysis demonstrates that the existence of finest grains will lead to enhanced local fracture toughness.

KW - Crack initiation

KW - Energy methods

KW - Finest grains

KW - Nanocrystalline materials

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DO - 10.1016/j.matdes.2013.05.044

M3 - 文章

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SN - 0264-1275

VL - 52

SP - 30

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JO - Materials and Design

JF - Materials and Design

IS - 4

ER -

An energy approach to account for crack initiation in nanocrystalline materials

Abstract

Keywords

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