Blister formation and hydrogen retention in aluminium and beryllium: A modeling and experimental approach

Quirós, C.; Mougenot, Jonathan; Lombardi, G.; Rédolfi, M.; Brinza, Ovidiu; Charles, Y.; Michau, Armelle; Hassouni, K.

doi:10.1016/j.nme.2016.12.036

Cited by 22 publications

(16 citation statements)

References 27 publications

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“…(5) at each GB separation. are all rather high [43], ranging from 2 to 7 GPa according to [42]. As clarified below, these examples nonetheless are sufficiently representative for conclusions on the general behaviour of the system under the influence of H in the slow fracture limit to be made.…”

Section: Atomistic Fracture Modesmentioning

confidence: 70%

H induced decohesion of an Al grain boundary investigated with first principles: General conditions for instant breakage and local delayed fracture

Ehlers

Seydou

Tingaud

et al. 2020

Computational Materials Science

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The uniaxial tensile test response of a H decorated Σ5 [100] twist grain boundary (GB) in face-centred-cubic Al has been examined with first principles. The impurity shows a strong tendency to relocate during loading. To capture these H movements, the standard model framework was extended to probe loading-unloading hysteresis. Due to the strong monotonic decrease in the H formation energy with rising GB elongation, the maximum tensile stress accepted by the H decorated GB in the slow fracture limit generally is reached before breakage becomes thermodynamically favourable. For any intact GB configuration visited upon exceeding this stress, the assumption of global chemical equilibrium is argued to be violated. Moreover, while breakage remains ensured from the slow fracture limit considerations, it may in practice require the influx of H to the GB vicinity. A quantitative analysis of GB destabilisation in this scenario requires multi-scale modelling even in the slow fracture limit.

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Section: Atomistic Fracture Modesmentioning

confidence: 70%

H induced decohesion of an Al grain boundary investigated with first principles: General conditions for instant breakage and local delayed fracture

Ehlers

Seydou

Tingaud

et al. 2020

Computational Materials Science

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“…An alternative consists of performing hydrogen plasma surface interactions with granular nanometals using a high-frequency microwave generator. Such approach has already been successfully applied for hydrogen plasma interaction with structural materials relevant for fusion applications, like Al and W [38][39][40] for instance. In those cases, hydrogen bubbling was achieved and its effect on the mechanical properties of the treated metals was investigated.Within this general idea, we aimed to develop a new material-processing approach based on soft chemistry, namely the polyol process [41], and cold H 2 plasma implantation, to produce non-usual metal hydride granular nanomaterials with a high and ideally reversible hydrogen storage capacity.Therefore, to be as challenging as possible, we decided to apply this original hydrogenation route to a non-usual metal hydride, namely Ni metal.…”

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confidence: 99%

mentioning

confidence: 99%

Polyol Process Coupled to Cold Plasma as a New and Efficient Nanohydride Processing Method: Nano-Ni2H as a Case Study

Haj-Khlifa

Nowak

Beaunier³

et al. 2020

Nanomaterials

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An alternative route for metal hydrogenation has been investigated: cold plasma hydrogen implantation on polyol-made transition metal nanoparticles. This treatment applied to a challenging system, Ni–H, induces a re-ordering of the metal lattice, and superstructure lines have been observed by both Bragg–Brentano and grazing incidence X-ray diffraction. The resulting intermetallic structure is similar to those obtained by very high-pressure hydrogenation of nickel and prompt us to suggest that plasma-based hydrogen implantation in nanometals is likely to generate unusual metal hydride, opening new opportunities in chemisorption hydrogen storage. Typically, almost isotropic in shape and about 30 nm sized hexagonal-packed Ni2H single crystals were produced starting from similarly sized cubic face-centred Ni polycrystals.

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“…where " is the equilibrium constant for equation (6), so that " = &∆( ! /*" with ∆ " the trap binding energy with respect to the lattice site, the universal gas constant and the absolute temperature. "…”

Section: Expressions Of the Trapped Hydrogen Concentration Ratementioning

confidence: 99%

“…Hydrogen transport properties depend on the evolution of traps density. Such evolution is encountered in many applications involving plastic deformation or plasma exposed surfaces [5,6]. Considering hydrogen transport in elastic-plastic material, the finite element approach of initial boundary values problems is widely based on the transport equations proposed by Krom et al [2], following the pioneering work of Sofronis and McMeeking [1].…”

Section: Introductionmentioning

confidence: 99%

Effect of transient trapping on hydrogen transport near a blunting crack tip

Charles

Mougenot

Gaspérini

2021

International Journal of Hydrogen Energy

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The paper revisits the way transient trapping is introduced in the literature based on the Sofronis and McMeeking model [1] of hydrogen transport. It is shown that the direct use of the improved formulation made by Krom et al. [2] for transient trapping may lead to nonphysical results of hydrogen concentration in case of an insulated system. The use of McNabb and Foster trapping kinetic equation is more relevant, and its ability to model both trap creation and kinetic trapping is investigated on a Small Scale Yielding configuration for the sake of comparison with a reference case from the literature. A parametric study is conducted, exhibiting differences with literature, and emphasizes on the significant effect of trapping kinetics on the hydrogen distribution.

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Blister formation and hydrogen retention in aluminium and beryllium: A modeling and experimental approach

Cited by 22 publications

References 27 publications

H induced decohesion of an Al grain boundary investigated with first principles: General conditions for instant breakage and local delayed fracture

H induced decohesion of an Al grain boundary investigated with first principles: General conditions for instant breakage and local delayed fracture

Polyol Process Coupled to Cold Plasma as a New and Efficient Nanohydride Processing Method: Nano-Ni2H as a Case Study

Effect of transient trapping on hydrogen transport near a blunting crack tip

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