Investigation of hydrogen attack in 2.25Cr1Mo steels with a high-triaxiality void growth model

Burg, M.W.D. van der; Giessen, van der Erik; Brouwer, R.C.

doi:10.1016/1359-6454(95)00203-0

Cited by 46 publications

(49 citation statements)

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“…ln (r i /r o ) and standard equilibrium reaction model of the hydrogenmethane reaction described in [6], which builds on the work of (among others) Lundberg et al [27], Odette and Vagarali [28] and Parthasarathy and Shewmon [29]. The influence of Mo on the methane pressure is neglected since thermodynamic data are not available for Mo.…”

Section: Resultsmentioning

confidence: 99%

“…[6]). We here assume the rather aggressive carbide, M 3 C consisting of 30% Cr, which will result in a conservative lifetime prediction.…”

Section: Resultsmentioning

confidence: 99%

“…[12,[14][15][16][17]. Sintering stresses are neglected in the analyses since they do not affect time to failure [6]. It is noted that the growth relations involve two modes of creep cavity growth, indicated by H and L in Box 1, as established in [5].…”

Section: Relations Concerning Cavitationmentioning

confidence: 99%

“…Box 1 contains a summary of the cavity growth relations; the relations are described in detail in [6] and build on work in e.g. [12,[14][15][16][17].…”

Section: Relations Concerning Cavitationmentioning

confidence: 99%

“…If the stress state is estimated accurately, then the lifetimes obtained from these analyses (e.g. [3,4,6]) can be considered as first conservative predictions.…”

Section: Introductionmentioning

confidence: 99%

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A continuum damage analysis of hydrogen attack in a 2.25Cr–1Mo pressure vessel

Burg

Giessen

Tvergaard

1998

Materials Science and Engineering: A

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A continuum damage analysis of hydrogen attack in a 2.25Cr-1Mo pressure vessel Burg, M.W.D. van der; Giessen, E. van der; Tvergaard, V. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. AbstractA micromechanically based continuum damage model is presented to analyze the stress, temperature and hydrogen pressure dependent material degradation process termed hydrogen attack, inside a pressure vessel. Hydrogen attack (HA) is the damage process of grain boundary facets due to a chemical reaction of carbides with hydrogen, thus forming cavities with high pressure methane gas. Driven by the methane gas pressure, the cavities grow, while remote tensile stresses can significantly enhance the cavitation rate. The damage model gives the strain-rate and damage rate as a function of the temperature, hydrogen pressure and applied stresses. The model is applied to study HA in a vessel wall, where nonuniform distributions of hydrogen pressure, temperature and stresses result in a nonuniform damage distribution over the vessel wall. Stresses inside the vessel wall first tend to accelerate and later decelerate the cavitation rate significantly. Numerical studies for different material parameters and different stress conditions demonstrate the HA process inside a vessel in time. Also, the lifetime of the pressure vessel is determined. The analyses underline that the general applicability of the Nelson curve is questionable. © 1998 Elsevier Science S.A.

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Section: Resultsmentioning

confidence: 99%

“…[6]). We here assume the rather aggressive carbide, M 3 C consisting of 30% Cr, which will result in a conservative lifetime prediction.…”

Section: Resultsmentioning

confidence: 99%

Section: Relations Concerning Cavitationmentioning

confidence: 99%

“…Box 1 contains a summary of the cavity growth relations; the relations are described in detail in [6] and build on work in e.g. [12,[14][15][16][17].…”

Section: Relations Concerning Cavitationmentioning

confidence: 99%

“…If the stress state is estimated accurately, then the lifetimes obtained from these analyses (e.g. [3,4,6]) can be considered as first conservative predictions.…”

Section: Introductionmentioning

confidence: 99%

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