Hydrogen-induced degradation behavior of nickel alloy studied using acoustic emission technique

Soundararajan, Chandrahaasan K.; Myhre, Aleksander Omholt; Sendrowicz, Aleksander; Lu, Xu; Vinogradov, Alexei

doi:10.1016/j.msea.2023.144635

Cited by 4 publications

(2 citation statements)

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“…Electrochemical charging and gaseous H charging can be applied in both in situ and ex situ experiments. On the one hand, ex situ H charging is simpler and easily enables an in situ observation and record of microstructure evolution during mechanical testing. , However, ex situ H condition is not best suitable for bcc metals considering their high H diffusivity because pre-charging and mechanical testing may not be able to resolve H effect when H atoms diffuse out quickly . On the other hand, only in situ H charging mimics the real application where H is continuously supplied during loading.…”

Section: Knowledge Base About Hementioning

confidence: 99%

“…The difference in H diffusivity between the new phases and matrix accelerates H absorption and is deemed to potentially alter the HE mechanism. Further, cathodic H charging can induce surface cracking in fcc metals as a consequence of internal stresses associated with H concentration gradient. ,,, The internal stresses can alter the subsurface lattice arrangement and possibly influence H dissolution and diffusion. H-induced blisters with high-pressure H gas inside are often observed in bcc metals. , …”

Section: Knowledge Base About Hementioning

confidence: 99%

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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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