Studying crack propagation along symmetric tilt grain boundary with H segregation in Ni by MD simulation

Chen, Jiawei; Liang, Shuang; Zhu, Yaxin; Zhao, Lv; Huang, Minsheng; Li, Zhenhuan

doi:10.1016/j.commatsci.2022.111569

Cited by 13 publications

(2 citation statements)

References 59 publications

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“…Ding et al 675 further revealed a nanoscale H-induced TG to IG fracture transition in nickel, where GBdislocation interaction facilitates vacancy generation and causes nanovoid nucleation at GB. Chen et al 676 found that H-inhibited GB migration and H-enhanced GB dislocation emission together lead to cleavage-like crack propagation along the GB.…”

Section: H−dislocation Interactionsmentioning

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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Section: H−dislocation Interactionsmentioning

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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“…The GBs have been acknowledged to play a crucial role in the mechanical properties of nanocrystalline materials. For example, GB-mediated plasticity is assumed to dominate the ductility and fracture behavior of nanocrystalline materials [ 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. Both intragranular and intergranular fracture behaviors were observed during tension, which can be highly dependent on grain sizes, GB characteristics, and loading conditions.…”

Section: Introductionmentioning

confidence: 99%

The Shock-Induced Deformation and Spallation Failure of Bicrystal Copper with a Nanoscale Helium Bubble via Molecular Dynamics Simulations

Shao

Wang

2023

Nanomaterials

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Both the nanoscale helium (He) bubble and grain boundaries (GBs) play important roles in the dynamic mechanical behavior of irradiated nanocrystalline materials. Using molecular dynamics simulations, we study the shock-induced deformation and spallation failure of bicrystal copper with a nanoscale He bubble. Two extreme loading directions (perpendicular or parallel to the GB plane) and various impact velocities (0.5–2.5 km/s) are considered. Our results reveal that the He bubble shows hindrance to the propagation of shock waves at lower impact velocities but will accelerate shock wave propagation at higher impact velocities due to the local compression wave generated by the collapse of the He bubble. The parallel loading direction is found to have a greater effect on He bubble deformation during shock compression. The He bubble will slightly reduce the spall strength of the material at lower impact velocities but has a limited effect on the spallation process, which is dominated by the evolution of the GB. At lower impact velocities, the mechanism of spall damage is dominated by the cleavage fracture along the GB plane for the perpendicular loading condition but dominated by the He bubble expansion and void growth for the parallel loading condition. At higher impact velocities, micro-spallation occurs for both loading conditions, and the effects of GBs and He bubbles can be ignored.

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Transition from grain boundary migration to grain boundary sliding in magnesium bicrystals

Xing,

Fan,

et al. 2024

Acta Mech. Sin.

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Studying crack propagation along symmetric tilt grain boundary with H segregation in Ni by MD simulation

Cited by 13 publications

References 59 publications

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

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

The Shock-Induced Deformation and Spallation Failure of Bicrystal Copper with a Nanoscale Helium Bubble via Molecular Dynamics Simulations

Transition from grain boundary migration to grain boundary sliding in magnesium bicrystals

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