Contributions of polarized dislocation walls, internal stresses and vacancies on hydrogen trapping processes in tensile strengthening (100) nickel single crystal

Oudriss, A.; Martin, Frantz; Creus, J.; Bouhattate, J.; Marchetti, L.; Feaugas, X.

doi:10.1016/j.actamat.2022.118622

Cited by 13 publications

(5 citation statements)

References 98 publications

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“…Plastic deformation induces various defects, such as vacancies and dislocations, acting as traps for hydrogen atoms. With the increasing pre-strain, the trap density increases, thereby promoting more hydrogen uptake (Table 1), which is consistent with earlier studies focusing on hydrogen diffusion in different alloy systems: DP steels [17], carbon steels [18], nickel alloys [10,11].…”

Section: Ecni and Hydrogen Content Measurementsupporting

confidence: 91%

“…The preferential formation of hydrogen-enhanced strain-induced vacancy clusters close to grain boundary regions has also been reported in Ni-201 alloy [9]. Additionally, Oudriss et al reported that, in the case of pre-strained pure nickel, the initial concentration of vacancies plays a key role in the formation of new vacancies by hydrogen during permeation experiments [11]. A common consensus among these studies is that hydrogen facilitates the dynamic evolution of lattice defects; however, the prerequisites for such a process remain unclear.…”

Section: Introductionmentioning

confidence: 70%

“…Our study indicates that, during hydrogen charging, the pre-existing lattice defects promote hydrogen uptake and facilitate dislocation activity-as observed in the scanning probe microscopy images, after charging, in the form of slip lines (see Figure A2)-and thereby enhance strain-induced vacancy concentration. Thus, the decrease in hardness is due to hydrogen-induced vacancy enhancement through dislocation interactions in pre-strained samples [11,35,36]. Even though around 5% of residual hydrogen is present after the anodic sequence in pre-strained samples, the hydrogen-enhanced vacancy formation subdues the hardening effect.…”

Section: Hydrogen Effect On Plastic Deformationmentioning

confidence: 99%

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Distinct Evidence of Hydrogen-Enhanced Defect Formation on Pre-Strained Nickel Alloy 625 during In Situ Electrochemical Nanoindentation Test

Soundararajan,

Lu,

Wang

et al. 2024

Metals

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In the present work, in situ electrochemical nanoindentation was utilized to investigate the hydrogen effect on the nanomechanical properties of tensile pre-strained nickel alloy (0%, 5% and 20%). The study reveals that hydrogen-induced hardening occurs during cathodic polarization due to hydrogen incorporation and softening behavior during anodic polarization; this is due to the irreversible microstructure modification induced in the presence of hydrogen solutes. Their respective contributions were quantified by fitting the elastoplastic part of the load-displacement data. In addition, the differences in their plastic behaviors were investigated in detail by examining the dislocation structure underneath the indents. This study aims to shed light on hydrogen’s interaction with pre-existing defects.

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Section: Ecni and Hydrogen Content Measurementsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 70%

Section: Hydrogen Effect On Plastic Deformationmentioning

confidence: 99%

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Distinct Evidence of Hydrogen-Enhanced Defect Formation on Pre-Strained Nickel Alloy 625 during In Situ Electrochemical Nanoindentation Test

Soundararajan,

Lu,

Wang

et al. 2024

Metals

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“…The release of internal stress can lead to an increase in dislocations, thereby reducing elongation and increasing the tensile strength of ECF . Dislocation density is usually associated with grain morphology, recrystallized grains contain no dislocations, substructured grains store a significant amount of dislocations at grain boundaries, and distorted grains are replete with dislocations. , At room temperature, electroplated copper undergoes self-annealing behavior, leading to recrystallization, the formation of substructures, and the presence of distorted grains. − While the interior of the distorted grains is filled with dislocations, the proportion of distorted grains throughout the entire crystal is very small. Therefore, our primary focus is on the proportion of substructured grains.…”

Section: Resultsmentioning

confidence: 99%

Relationship between the Orientation of the (100) Crystal Plane and Elongation in Ultrathin Electrolytic Copper Foils

Fan,

Hu,

et al. 2024

J. Phys. Chem. C

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Electrolytic copper foils (ECFs), owing to their excellent mechanical properties and conductivity, have become an indispensable component as an anodic current collector in lithiumion batteries. ECFs often show texture properties, but the intrinsic relationship between the texture and mechanical properties is rarely reported. The authors find a conspicuous preference for the (100) crystal plane in 6 and 8 μm ultrathin ECFs with high elongation. And certain ECFs even exhibit a positive correlation trend between elongation and the (100) relative texture coefficient. It can be inferred that enhancing the (100) texture contributes to the improvement of the elongation in ECFs. Moreover, the Schmid factor values for the ( 111), (100), and ( 110) planes are calculated. The results revealed that the number of slip systems that can be activated under different tensile directions of the (100) plane is the largest, while the number of (110) plane is the least. It implies that under equivalent conditions, ECFs with (100) plane orientation are more prone to undergo plastic deformation, thereby facilitating high elongation. In contrast, the (110) plane orientation contributes to a high tensile strength.

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“…Some authors have proposed a diffusion enhancement through sub-grain cellular structures produced by SLM for 316L and for an HEA, but the generalization of these finding still remain unclear . Trapping at dislocation cells is also a topic worth of further investigation. , …”

Section: Perspectives and Future Directionsmentioning

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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Contributions of polarized dislocation walls, internal stresses and vacancies on hydrogen trapping processes in tensile strengthening (100) nickel single crystal

Cited by 13 publications

References 98 publications

Distinct Evidence of Hydrogen-Enhanced Defect Formation on Pre-Strained Nickel Alloy 625 during In Situ Electrochemical Nanoindentation Test

Distinct Evidence of Hydrogen-Enhanced Defect Formation on Pre-Strained Nickel Alloy 625 during In Situ Electrochemical Nanoindentation Test

Relationship between the Orientation of the (100) Crystal Plane and Elongation in Ultrathin Electrolytic Copper Foils

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

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