On the effects of texture and microstructure on hydrogen transport towards notch tips: A CPFE study

Tondro, Alireza; Abdolvand, Hamidreza

doi:10.1016/j.ijplas.2022.103234

Cited by 34 publications

(6 citation statements)

References 75 publications

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“…In a recent study, Gong et al analyzed the HE mechanisms in high-strength steels [9]. Texture and microtexture are influencing factors in HE transport toward the zone of hydrogen entry, as it was revealed in the study [10]. Hydrogen permeation was studied in [11] for three different pipeline steels to reveal the HE susceptibility and, in [12], the hydrogen permeation was numerical simulated to reveal the hydrogen apparent solubility and hydrogen trapping site characteristics: trapping density and hydrogen-trapping binding energy.…”

Section: Introductionmentioning

confidence: 93%

Innovative Design of Residual Stress and Strain Distributions for Analyzing the Hydrogen Embrittlement Phenomenon in Metallic Materials

2022

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Round-notched samples are commonly used for testing the susceptibility to hydrogen embrittlement (HE) of metallic materials. Hydrogen diffusion is influenced by the stress and strain states generated during testing. This state causes hydrogen-assisted micro-damage leading to failure that is due to HE. In this study, it is assumed that hydrogen diffusion can be controlled by modifying such residual stress and strain fields. Thus, the selection of the notch geometry to be used in the experiments becomes a key task. In this paper, different HE behaviors are analyzed in terms of the stress and strain fields obtained under diverse loading conditions (un-preloaded and preloaded causing residual stress and strains) in different notch geometries (shallow notches and deep notches). To achieve this goal, two uncoupled finite element (FE) simulations were carried out: (i) a simulation by FE of the loading sequences applied in the notched geometries for revealing the stress and strain states and (ii) a simulation of hydrogen diffusion assisted by stress and strain, for estimating the hydrogen distributions. According to results, hydrogen accumulation in shallow notches is heavily localized close to the wire surface, whereas for deep notches, hydrogen is more uniformly distributed. The residual stress and plastic strains generated by the applied preload localize maximum hydrogen concentration at deeper points than un-preloaded cases. As results, four different scenarios are established for estimating “a la carte” the HE susceptibility of pearlitic steels just combining two notch depths and the residual stress and strain caused by a preload.

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Section: Introductionmentioning

confidence: 93%

Innovative Design of Residual Stress and Strain Distributions for Analyzing the Hydrogen Embrittlement Phenomenon in Metallic Materials

2022

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“…231 Continuum modeling of H transport in resolved polycrystalline structures has also been advanced, employing sophisticated treatments of grains and GBs. 232,233 This includes the adoption of a diffusivity tensor and consideration of texture effects on H transport, 234 implementing the impact of GB characteristics and misorientation on macroscopic diffusivity 232,235,236 and the role of dislocation pile-up at boundaries, 237,238 as well as integrating transport equations with crystal plasticity formulations. 239 The explicit consideration of trapping in numerical models, e.g., the two-level models, requires trapping density and binding energy as input parameters.…”

Section: Krom Et Al (1999) 222mentioning

confidence: 99%

“…When discrete trapping sites fail to represent the microstructure, e.g., in disordered alloys, a Gaussian distribution for the density and energy of sites can be considered . Continuum modeling of H transport in resolved polycrystalline structures has also been advanced, employing sophisticated treatments of grains and GBs. , This includes the adoption of a diffusivity tensor and consideration of texture effects on H transport, implementing the impact of GB characteristics and misorientation on macroscopic diffusivity ,, and the role of dislocation pile-up at boundaries, , as well as integrating transport equations with crystal plasticity formulations …”

Section: Knowledge Base About Hementioning

confidence: 99%

Hydrogen Embrittlement as a Conspicuous Material Challenge─Comprehensive Review and Future Directions

Yu,

Díaz,

et al. 2024

Chem. Rev.

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Hydrogen is considered a clean and efficient energy carrier crucial for shaping the net-zero future. Large-scale production, transportation, storage, and use of green hydrogen are expected to be undertaken in the coming decades. As the smallest element in the universe, however, hydrogen can adsorb on, diffuse into, and interact with many metallic materials, degrading their mechanical properties. This multifaceted phenomenon is generically categorized as hydrogen embrittlement (HE). HE is one of the most complex material problems that arises as an outcome of the intricate interplay across specific spatial and temporal scales between the mechanical driving force and the material resistance fingerprinted by the microstructures and subsequently weakened by the presence of hydrogen. Based on recent developments in the field as well as our collective understanding, this Review is devoted to treating HE as a whole and providing a constructive and systematic discussion on hydrogen entry, diffusion, trapping, hydrogen–microstructure interaction mechanisms, and consequences of HE in steels, nickel alloys, and aluminum alloys used for energy transport and storage. HE in emerging material systems, such as high entropy alloys and additively manufactured materials, is also discussed. Priority has been particularly given to these less understood aspects. Combining perspectives of materials chemistry, materials science, mechanics, and artificial intelligence, this Review aspires to present a comprehensive and impartial viewpoint on the existing knowledge and conclude with our forecasts of various paths forward meant to fuel the exploration of future research regarding hydrogen-induced material challenges.

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“…In the present work in Zr-2.5%Nb, we have found a smaller H content but averaged over a larger volume. On the other hand, Tondro & Abdolvand [12] simulated H transport near a V notch tip during DHC at 330°C using a coupled diffusion-CPFE model (crystal plasticity finite element) for the α-phase of Zr-2.5Nb, for an initial homogeneous content of 100 wt. ppm using the typical texture of PT.…”

Section: Extruded Tubementioning

confidence: 99%

Development of in-situ Delayed Hydride Cracking tests using neutron imaging to study the H redistribution in Zr-2.5%Nb

Soria,

Gomez,

Grosse

et al. 2023

J. Phys.: Conf. Ser.

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Delayed Hydride Cracking (DHC) is a failure mechanism that occurs in Zr alloys under certain conditions of hydrogen concentration, temperature and stress gradient. In service, hydrogen produced by corrosion reaction can be incorporated in Zr alloys and if the solid solubility is exceeded, hydrogen precipitates as zirconium hydride. The presence of a stress concentrator, such as a crack, generates the hydrogen diffusion and precipitation to the high stress zone beginning the DHC process. In this work, in-situ DHC tests in air at 250°C were performed at ANTARES, the neutron imaging facility of the FRM-II reactor. Samples of Zr2.5%Nb produced from extruded tubes and pressure tubes were studied using a stress rig specially modified to perform DHC tests in the neutron beam. H redistribution during mechanical testing was followed in-situ by registering the changes in neutron transmission. The results were compared with the images obtained by light optical microscopy after the tests. The results highlight the capabilities of neutron imaging to analyze time-dependent H distribution during DHC crack growth.

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On the effects of texture and microstructure on hydrogen transport towards notch tips: A CPFE study

Cited by 34 publications

References 75 publications

Innovative Design of Residual Stress and Strain Distributions for Analyzing the Hydrogen Embrittlement Phenomenon in Metallic Materials

Innovative Design of Residual Stress and Strain Distributions for Analyzing the Hydrogen Embrittlement Phenomenon in Metallic Materials

Hydrogen Embrittlement as a Conspicuous Material Challenge─Comprehensive Review and Future Directions

Development of in-situ Delayed Hydride Cracking tests using neutron imaging to study the H redistribution in Zr-2.5%Nb

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