Modeling of the Slow Crack Growth Caused by Internal Hydrogen in Metals

W. Wu; Ya Wang; L. Shen; J. Gong

doi:10.1007/s11003-018-0165-4

Modeling of the Slow Crack Growth Caused by Internal Hydrogen in Metals

W. Wu, Ya Wang, L. Shen, J. Gong

School of Mechanical and Power Engineering

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

1 Scopus citations

Abstract

Hydrogen-induced slow crack growth exhibits, in general, three distinct stages of crack growth kinetics, and stages I and II are controlled by hydrogen diffusion. A model that describes the kinetics of crack growth caused by internal hydrogen (in stages I and II) is proposed on the basis of the linear elastic fracture mechanics, stress-induced hydrogen diffusion theory and hydrogen-enhanced decohesion mechanism for hydrogen-induced cracking. The model predicts the crack growth rate da/dt for both stages I and II as a function of the stress intensity factor K_I and the initial level of hydrogen concentration. Some experimental data reported in the literature are used to validate the model and good agreement is obtained.

Original language	English
Pages (from-to)	115-123
Number of pages	9
Journal	Materials Science
Volume	54
Issue number	1
DOIs	https://doi.org/10.1007/s11003-018-0165-4
State	Published - 1 Jul 2018

Keywords

crack growth
hydrogen diffusion
hydrogen embrittlement
hydrogen-induced cracking

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10.1007/s11003-018-0165-4

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title = "Modeling of the Slow Crack Growth Caused by Internal Hydrogen in Metals",

abstract = "Hydrogen-induced slow crack growth exhibits, in general, three distinct stages of crack growth kinetics, and stages I and II are controlled by hydrogen diffusion. A model that describes the kinetics of crack growth caused by internal hydrogen (in stages I and II) is proposed on the basis of the linear elastic fracture mechanics, stress-induced hydrogen diffusion theory and hydrogen-enhanced decohesion mechanism for hydrogen-induced cracking. The model predicts the crack growth rate da/dt for both stages I and II as a function of the stress intensity factor KI and the initial level of hydrogen concentration. Some experimental data reported in the literature are used to validate the model and good agreement is obtained.",

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AU - Wu, W.

AU - Wang, Ya

AU - Shen, L.

AU - Gong, J.

PY - 2018/7/1

Y1 - 2018/7/1

N2 - Hydrogen-induced slow crack growth exhibits, in general, three distinct stages of crack growth kinetics, and stages I and II are controlled by hydrogen diffusion. A model that describes the kinetics of crack growth caused by internal hydrogen (in stages I and II) is proposed on the basis of the linear elastic fracture mechanics, stress-induced hydrogen diffusion theory and hydrogen-enhanced decohesion mechanism for hydrogen-induced cracking. The model predicts the crack growth rate da/dt for both stages I and II as a function of the stress intensity factor KI and the initial level of hydrogen concentration. Some experimental data reported in the literature are used to validate the model and good agreement is obtained.

AB - Hydrogen-induced slow crack growth exhibits, in general, three distinct stages of crack growth kinetics, and stages I and II are controlled by hydrogen diffusion. A model that describes the kinetics of crack growth caused by internal hydrogen (in stages I and II) is proposed on the basis of the linear elastic fracture mechanics, stress-induced hydrogen diffusion theory and hydrogen-enhanced decohesion mechanism for hydrogen-induced cracking. The model predicts the crack growth rate da/dt for both stages I and II as a function of the stress intensity factor KI and the initial level of hydrogen concentration. Some experimental data reported in the literature are used to validate the model and good agreement is obtained.

KW - crack growth

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KW - hydrogen embrittlement

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JO - Materials Science

JF - Materials Science

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Modeling of the Slow Crack Growth Caused by Internal Hydrogen in Metals

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Keywords

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