A multi-scale analysis of the different interactions between defects and hydrogen: A review on the contribution of the elastic fields
| Autor: | J. Bouhattate, A. Metsue, A.M. Hallil, Jia Li, G. Hachet, Abdelali Oudriss, Xavier Feaugas |
|---|---|
| Přispěvatelé: | Laboratoire des Sciences de l'Ingénieur pour l'Environnement - UMR 7356 (LaSIE), Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Hydrogen Thermal desorption spectroscopy Mechanical Engineering 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology Plasticity Crystallographic defect Nickel 020303 mechanical engineering & transports 0203 mechanical engineering chemistry Nanocrystal Mechanics of Materials Chemical physics [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] General Materials Science Grain boundary ComputingMilieux_MISCELLANEOUS 021101 geological & geomatics engineering Hydrogen embrittlement |
| Zdroj: | Engineering Fracture Mechanics Engineering Fracture Mechanics, Elsevier, 2019, 218, pp.106621. ⟨10.1016/j.engfracmech.2019.106621⟩ |
| ISSN: | 0013-7944 |
| DOI: | 10.1016/j.engfracmech.2019.106621⟩ |
| Popis: | Hydrogen Embrittlement (HE) is one of the causes mainly evoked in premature rupture of industrial components exposed to an aggressive environment. Many studies have been conducted in order to understand the mechanisms involved during this degradation and the influence of the metallurgical states. Good knowledge of hydrogen interactions with crystal defects is a key element in the understanding of the different damage processes associated with HE in fcc materials. In this state of mind, we have undertaken a systematic study of these interactions in nickel alloys using coupled multi-scale approaches. These latter correspond to the association of atomistic calculations (EAM, DFT) with experimental tests: Electrochemical Permeation (EP), Secondary Ionization Mass Spectrometry (ToF-SIMS) analysis and Thermal Desorption Spectroscopy (TDS) in order to evaluate the hydrogen states in presence of different crystal defects. Among the major results, we focus our attention on the interaction between hydrogen and vacancies in nickel single crystals, the trapping and the segregation of hydrogen for several dislocation distributions (cells, PSB, GBs, …) and the contribution of the grain boundaries (GBs) as well as the precipitates to the hydrogen diffusion and trapping in nanocrystals, polycrystals and bi-crystals. In all the cases, we have questioned the impact of elastic fields associated with the defect to apparent solubility and diffusion of hydrogen. In the second part, we explore the potential impacts of hydrogen on elastic properties and their implication on the mechanisms of plasticity. |
| Databáze: | OpenAIRE |
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