2012
DOI: 10.1016/j.actamat.2012.06.014
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Hydrogen embrittlement of ferritic steels: Observations on deformation microstructure, nanoscale dimples and failure by nanovoiding

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Cited by 311 publications
(142 citation statements)
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“…Vacancies certainly play a role in all of the hydrogen embrittlement mechanisms. Although HESIV alone does not present a conclusive mechanism of embrittlement, Neeraj et al [147] have proposed a combination mechanism of plasticity-generation (HELP), hydrogen-enhanced vacancy formation (HESIV) and nanovoid coalescence to explain the fracture pathways of both X65 and X80 which failed by quasibrittle fracture. This is presented pictorially in Fig.…”
Section: Descriptionmentioning
confidence: 99%
“…Vacancies certainly play a role in all of the hydrogen embrittlement mechanisms. Although HESIV alone does not present a conclusive mechanism of embrittlement, Neeraj et al [147] have proposed a combination mechanism of plasticity-generation (HELP), hydrogen-enhanced vacancy formation (HESIV) and nanovoid coalescence to explain the fracture pathways of both X65 and X80 which failed by quasibrittle fracture. This is presented pictorially in Fig.…”
Section: Descriptionmentioning
confidence: 99%
“…5 One possible mechanism underlying such transition could be plasticity-mediated atomic decohesion, involving the so-called "valve" effect of coupling a small variation of cohesive strength with a large change of plastic dissipation during fracture. 8,37,38 To confirm the efficacy of this valve effect, it is necessary to extend the present atomisticallybased thermodynamic model to address the kinetic aspects of H diffusion and crack growth at GBs, as well as the coupling effects of H-enhanced localized plasticity (HELP), H-enhanced decohesion (HEDE), H-enhanced vacancy stabilization (HEVS) 39,40 for realistic geometries of three-dimensional cracks and polycrystals on the time scale relevant to laboratory experiments. [41][42][43] …”
Section: Discussionmentioning
confidence: 99%
“…3,4], omits an important feature, namely, the formation of nanovoids ahead of cracks. Nanovoid formation at intermediate ∆K levels is often overlooked because the presence of nano-scale dimples on fracture surfaces is clearly resolved only when 'state-of-the-art' high-resolution SEM is used [5] or, even better, when TEM is used to examine well-shadowed replicas under ideal conditions [6] (Fig. 3).…”
Section: Review Of Mechanisms and Some General Aspects Of Corrosion Fmentioning
confidence: 99%