Prediction of crack propagation under cyclic loading based on hydrogen diffusion

Xing, Xiao; Chen, W.; Zhang, Hao

doi:10.1016/j.matlet.2015.03.045

Cited by 23 publications

(18 citation statements)

References 27 publications

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“…Xing et al [233] have proposed a unified model for crack propagation under cyclic loading based on a decohesion mechanism that recovers the form of the Paris Law:…”

Section: Mesoscopic Models Of the Hid Mechanismmentioning

confidence: 99%

Understanding and mitigating hydrogen embrittlement of steels: a review of experimental, modelling and design progress from atomistic to continuum

et al. 2018

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Hydrogen embrittlement is a complex phenomenon, involving several lengthand timescales, that affects a large class of metals. It can significantly reduce the ductility and load-bearing capacity and cause cracking and catastrophic brittle failures at stresses below the yield stress of susceptible materials. Despite a large research effort in attempting to understand the mechanisms of failure and in developing potential mitigating solutions, hydrogen embrittlement mechanisms are still not completely understood. There are controversial opinions in the literature regarding the underlying mechanisms and related experimental evidence supporting each of these theories. The aim of this paper is to provide a detailed review up to the current state of the art on the effect of hydrogen on the degradation of metals, with a particular focus on steels. Here, we describe the effect of hydrogen in steels from the atomistic to the continuum scale by reporting theoretical evidence supported by quantum calculation and modern experimental characterisation methods, macroscopic effects that influence the mechanical properties of steels and established damaging mechanisms for the embrittlement of steels. Furthermore, we give an insight into current approaches and new mitigation strategies used to design new steels resistant to hydrogen embrittlement.

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“…Xing et al [233] have proposed a unified model for crack propagation under cyclic loading based on a decohesion mechanism that recovers the form of the Paris Law:…”

Section: Mesoscopic Models Of the Hid Mechanismmentioning

confidence: 99%

Understanding and mitigating hydrogen embrittlement of steels: a review of experimental, modelling and design progress from atomistic to continuum

et al. 2018

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“…Therefore, the multiplicative models proposed in Refs. 21,[25][26][27] can be reasonably applied to the ODA region, where the SIF values are below the threshold SIF.…”

Section: Hydrogen Assisted Crack Growth: a General Sif Formulationmentioning

confidence: 99%

“…In some cases (e.g., Refs. ), the acceleration induced by hydrogen in crack growth is modeled by vertically translating the Paris’ law or, equivalently, by amplifying the SIF through a correction factor. In some other cases (e.g., Refs.…”

Section: Introductionmentioning

confidence: 99%

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S‐N curves in the very‐high‐cycle fatigue regime: statistical modeling based on the hydrogen embrittlement consideration

Paolino

Tridello

Chiandussi

et al. 2016

Fatigue Fract Eng Mat Struct

111

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The continuous increment of durability and reliability requirements for many machinery components is significantly enhancing the research activity in the Very‐High‐Cycle Fatigue (VHCF) characterization of metallic materials, in particular of high‐strength steels for critical structural applications. According to the area model, the VHCF strength of high‐strength steels can be estimated from the projected area of the ‘Optically Dark Area’ (ODA), which plays a key role in the VHCF response of high‐strength steels: more than 95% of the total VHCF life is consumed in the ODA formation, with crack growing even though the Stress Intensity Factor (SIF) is below the threshold for crack growth. Following the hydrogen embrittlement theory proposed by Murakami, hydrogen is supposed to assist crack growth within the ODA. The present paper proposes a general SIF formulation for the analytical model of the hydrogen assisted crack growth within the ODA. Starting from the general SIF formulation, a general expression for the material fatigue limit is obtained in the paper. The statistical method for the estimation of the parameters involved in the proposed model is finally illustrated in the paper and numerically applied to an experimental dataset.

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“…Crack growth rate was found to increase with decreasing loading frequency until 10 −3 Hz, while it either remained constant for the underload-type variable amplitude cyclic loadings or decreased slightly for the constant amplitude loading when the loading frequency was lower than 10 −3 Hz (Yu et al, 2015). A theoretical model -based on hydrogen effects on the crack tip during the cyclic load condition -was developed by Yu et al to understand the crack growth behavior transition (Xing et al, 2015;Yu et al, 2015). The loading frequency must be low enough to create synchronized interactions at the crack tip between diffusible atomic hydrogen and cyclic loading, which appears very critical to crack growth rate.…”

Section: Effect Of Dynamic Loadingmentioning

confidence: 99%

Environmentally assisted cracking of pipeline steels in CO2 containing environment at near-neutral pH

et al. 2017

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The paper summarizes the results obtained by authors concerning near-neutral stress corrosion cracking (SCC) phenomena on buried pipelines. Stress corrosion tests according to different methodologies and fatigue propagation tests were executed on traditional steel grades. Tests were performed also on specimens pre-corroded according to a procedure developed to produce localized attacks similar to those observed during failure analysis on pipelines, acting as preferential sites for crack nucleation. Electrochemical tests were carried out in order to evaluate the influence of environmental parameter on pit formation. The main role of continuous plastic deformations on near-neutral SCC is confirmed. The effect of pH, CO2, and bicarbonate concentrations on pitting formation is discussed.

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Prediction of crack propagation under cyclic loading based on hydrogen diffusion

Cited by 23 publications

References 27 publications

Understanding and mitigating hydrogen embrittlement of steels: a review of experimental, modelling and design progress from atomistic to continuum

Understanding and mitigating hydrogen embrittlement of steels: a review of experimental, modelling and design progress from atomistic to continuum

S‐N curves in the very‐high‐cycle fatigue regime: statistical modeling based on the hydrogen embrittlement consideration

Environmentally assisted cracking of pipeline steels in CO2 containing environment at near-neutral pH

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