Study of Snoek-type relaxation in hydrogenated Inconel 600

Aaltonen, Pertti; Jagodzinski, Yu.; Tarasenko, A. S.; Smouk, S.; Hänninen, Hannu

doi:10.1080/01418619808239969

Cited by 11 publications

(7 citation statements)

References 16 publications

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“…This result suggests that hydrogen atoms in both nickel and fcc iron can hardly form the atomic pairs in the neighboring interstitial sites, which is an important argument in the discussion concerning a mechanism of Snoek‐like relaxation in hydrogen‐charged fcc iron and nickel‐based alloys (e.g., see Refs. 31–33). The Snoek relaxation in the bcc metals is caused by the strain‐induced jumps of interstitial atoms located in the octahedral sites where they create a tetragonal distortion.…”

Section: Resultsmentioning

confidence: 99%

Atomic interactions and hydrogen‐induced γ* phase in fcc iron–nickel alloys

Movchan

Shyvanyuk

Shanina

et al. 2010

Physica Status Solidi (a)

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Energy of metal-metal (Me-Me) and metal-hydrogen (Me-H) bonds in hydrogen-free and hydrogen-charged fcc iron, nickel, and iron-nickel alloys are ab initio calculated. It is shown that short-range decomposition of Fe-Ni solid solution and difference in Fe-H and Ni-H bonds are responsible for splitting of g reflections in the X-ray diffraction patterns, which is at variance with the common interpretation in terms of a hydrogen-caused g Ã phase. X-ray diffraction measurements confirm the absence of miscibility gap in the FeNi-H solid solution and its occurrence in Ni-H. Results of calculations are consistent with the absence of H-H pairs in pure nickel.

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Section: Resultsmentioning

confidence: 99%

Atomic interactions and hydrogen‐induced γ* phase in fcc iron–nickel alloys

Movchan

Shyvanyuk

Shanina

et al. 2010

Physica Status Solidi (a)

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“…2. It is seen that the dependency has a maximum at cathodic overpotential of 150 mV which corresponds to the hydride phase forming 7 in the subsurface layer at the applied charging conditions. To be free of the hydride forming the optimum value of the cathodic overpotential was chosen to be about 100 mV for all studied steels.…”

Section: Materials and Experimentalmentioning

confidence: 98%

Hydrogen Solubility and Diffusion in Austenitic Stainless Steels Studied with Thermal Desorption Spectroscopy

Yagodzinskyy

Todoshchenko

Papula

et al. 2010

steel research int.

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Hydrogen solubility and diffusion in austenitic stainless steels, namely AISI 310, AISI 301LN and AISI 201, are studied with thermal desorption spectroscopy (TDS) after electrochemical potentiostatic hydrogen pre‐charging. Temperature dependencies of hydrogen desorption for all studied steels manifest a complex main peak caused by hydrogen releasing from the steel lattice by diffusion. Depending on the steel and heating rate the peak is situated from 350 to 500 K and its shape reflects a specific of hydrogen diffusion in stainless steels, which are multicomponent alloys. Analysis of the TDS curves is based on the hydrogen diffusion model taking into account trapping of hydrogen atoms in the energetically deep interstitial positions in the steel crystal lattice. Diffusion coefficient of hydrogen and its total content after the same charging procedure are obtained from the TDS curves and compared for the studied steels.

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“…It has to be taken into account that main substitution elements in the nickel-based Inconel 600 alloy are chromium and iron. Because of the repulsive hydrogen-chromium interaction that follows from the absence of the Snoek-like relaxation in the hydrogen-charged Ni-Cr alloys [28], the only element, which can cause distortions from the cubic symmetry around hydrogen atom in the nickel lattice, is the iron. Thus, in general, the varied number of relaxation sub-peaks resulted from the fitting procedure under different charging conditions could be related to the composition-dependent distribution of the octahedrons containing hydrogen and substitution atoms.…”

Section: Discussionmentioning

confidence: 99%

“…The internal friction study of Inconel 600 alloy has been previously reported in [28]. The Snoek-like relaxation peak was analysed based on the idea of different number of iron atoms in the octahedrons around the hydrogen atoms, which should affect the activation enthalpy of hydrogen migration.…”

Section: Discussionmentioning

confidence: 99%

Hydrogen Mobility and Its Interaction with Dislocations in Nickel-Based Inconel 718 Alloy

Teus¹

2017

Metallofiz. Noveishie Tekhnol.

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The hydrogen effects in the nickel-based alloy Inconel 718 are studied using the mechanical spectroscopy and mechanical tests. The enthalpies of hydrogen-atoms' migration and hydrogen-dislocations binding as well as the condensation temperature for the hydrogen clouds at the dislocations are determined. It is concluded that interaction of hydrogen atoms with dislocations is responsible for hydrogen embrittlement.Key words: nickel-based alloy, hydrogen migration, hydrogen embrittlement, dislocations, mechanical spectroscopy.Вплив водню на стоп на основі ніклю Inconel 718 досліджено із викорис-танням методи механічної спектроскопії та механічних випробувань. Ви-значено ентальпію міґрації атомів Гідроґену, ентальпію зв'язку Гідроґену з дислокаціями, а також температуру конденсації Гідроґенових атмосфер навколо дислокацій. Зроблено висновок про те, що взаємодія атомів Гід-роґену з дислокаціями відповідає за водневу крихкість.Ключові слова: стоп на основі ніклю, міґрація Гідроґену, воднева крих-кість, дислокації, механічна спектроскопія.Влияние водорода на сплав на основе никеля Inconel 718 изучено при по-мощи метода механической спектроскопии и механических испытаний. Определены энтальпия миграции атомов водорода, энтальпия связи водо-рода с дислокациями, а также температура конденсации водородных ат-мосфер около дислокаций. Сделан вывод о том, что взаимодействие ато- Ìåòàëëîôèç. íîâåéøèå òåõíîë. / Metallofiz. Noveishie Tekhnol. 2017, т. 39, № 5, сс. 593-606 / DOI: 10.15407/mfint.39

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Study of Snoek-type relaxation in hydrogenated Inconel 600

Cited by 11 publications

References 16 publications

Atomic interactions and hydrogen‐induced γ* phase in fcc iron–nickel alloys

Atomic interactions and hydrogen‐induced γ* phase in fcc iron–nickel alloys

Hydrogen Solubility and Diffusion in Austenitic Stainless Steels Studied with Thermal Desorption Spectroscopy

Hydrogen Mobility and Its Interaction with Dislocations in Nickel-Based Inconel 718 Alloy

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