Multichannel diffusion vs TDS model on example of energy spectra of bound hydrogen in 34CrNiMo6 steel after a typical heat treatment

Belyaev, Аlexander K.; Polyanskiy, A. M.; Polyanskiy, Vladimir A.; Sommitsch, Christof; Yakovlev, Yu. A.

doi:10.1016/j.ijhydene.2016.03.198

Cited by 37 publications

(24 citation statements)

References 42 publications

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“…Generally, 5CrNiMo or H13 hot forging die are fabricated by hammer forging, mechanical shaping, and surface strengthening [1,2]. Surface strengthening technologies such as carbonitriding [3], thermal desorption spectroscopy (TDS) [4], physical vapor deposition (PVD) [5], chemical vapor deposition (CVD) [6], and plasma-assisted chemical vapor deposition (PACVD) [7] have been applied to medium-sized and small dies and achieved great results. Surfacing is realized by exerting heat sources or melt metal onto the surface of base metal [8].…”

Section: A N U S C R I P Tmentioning

confidence: 99%

“…To solve above problems, a new fabrication method of hot forging dies by bimetallic gradient surfacing technology was proposed by our group [9]. Two different ferrous alloys with gradient mechanical properties M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 4 were welded on a 5CrNiMo or H13 matrix as transition layer and surface strengthening layer to realize smooth transition of hardness and elementary composition. The surface strength and hardness of the forging die fabricated by this method achieved 1200 MPa and 50 HRC, respectively.…”

Section: A N U S C R I P Tmentioning

confidence: 99%

See 1 more Smart Citation

Study on the combination of cobalt-based superalloy and ferrous alloys by bimetal-layer surfacing technology in refabrication of large hot forging dies

Shen

Zhou

Xiong

et al. 2017

Journal of Alloys and Compounds

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Section: A N U S C R I P Tmentioning

confidence: 99%

Section: A N U S C R I P Tmentioning

confidence: 99%

Study on the combination of cobalt-based superalloy and ferrous alloys by bimetal-layer surfacing technology in refabrication of large hot forging dies

Shen

Zhou

Xiong

et al. 2017

Journal of Alloys and Compounds

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“…Были изучены образцы с большими пластическими деформациями [11][12][13][14][15][16][17]. Нагруже-ние образцов проводилось в разрывных машинах с определением нагрузки и средних дефор-маций.…”

Section: методы исследования и экспериментальные результатыunclassified

Boundary layer of hydrogen concentration under plastic deformation

Belyaev¹,

Mansyrev²,

Polyanskiy³

et al. 2017

DREAM

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A new model of instability of uniform plastic deformation with the formation of Lüders bands on the surface of a material being deformed is experimentally confirmed. It has been found that nonuniform plastic deformations correlate with hydrogen concentration during the testing of metal specimens in the atmosphere at room temperature. The presence of additional pores and microcracks formed as a result of plastic deformation is the cause of the correlation between plastic deformations and hydrogen concentrations in aluminum alloys. The effect of the boundary layer in the distribution of hydrogen concentrations has been detected. It reflects the fact that all changes associated with mechanical and thermo-mechanical loading are localized in a thin boundary layer at the surface of a metal specimen. The wave approach to the analysis of the continuum equations and the model of the boundary layer of a bicontinuous medium containing hydrogen are used to describe the observed phenomena. The constructed model makes it possible to describe the development of plastic deformation as a wave process in the boundary layer of a bicontinuous medium. Paris, 1923, vol. 176, pp. 507-510. 4. KeywordsPenning P. Mathematics of the Portevin-Le Chatelier effect. Acta Metallurgica, 1972, vol. 20, no. 10, pp. 1169-1175. DOI: 10.1016.Lebyodkin M., Brechetz Y., Estrin Y., Kubin L. Statistical behaviour and strain localization patterns in the Portevin-Le Chatelier effect. Acta Materialia, 1996, vol. 44, no. 11, pp. 4531-4541. DOI: 10.1016/135900076-6. 6.McCormiсk P.G. A model for the Portevin-Le Chatelier effect in substitutional alloys. Acta Metallurgica, 1972, vol. 20, no. 3, pp. 351-354. DOI: 10.1016 90028-4. 7.Kalk A., Nortmann A., Schwink C. Dynamic strain ageing and the boundaries of stable plastic deformation in Cu-Mn single crystals.

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“…Papers [18][19][20]27] were dedicated to interpretation of TDS peaks. Analysis of the causes of various TDS surges is crucial for the selection of reactor structural materials contacting with hydrogen isotopes.…”

Section: Introductionmentioning

confidence: 99%

“…Analysis of the causes of various TDS surges is crucial for the selection of reactor structural materials contacting with hydrogen isotopes. A sufficiently detailed review is presented in [19,20]. Where modeling does not take the dynamics of surface processes into account, TDS peaks are inevitably interpreted as a result of capture of diffusing atomic hydrogen by the structural defects (traps) of the material with different binding energies and (or) as a manifestation of multichannel diffusion [28].…”

Section: Introductionmentioning

confidence: 99%

The Inverse Problem of Identification of Hydrogen Permeability Model

Zaika

Rodchenkova

Kostikova

2018

Advances in Mathematical Physics

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One of the technological challenges for hydrogen materials science is the currently active search for structural materials with important applications (including the ITER project and gas-separation plants). One had to estimate the parameters of diffusion and sorption to numerically model the different scenarios and experimental conditions of the material usage (including extreme ones). The article presents boundary value problems of hydrogen permeability and thermal desorption with dynamical boundary conditions. A numerical method is developed for TDS spectrum simulation, where only integration of a nonlinear system of low order ordinary differential equations is required. The main final output of the article is a noise-resistant algorithm for solving the inverse problem of parametric identification for the aggregated experiment where desorption and diffusion are dynamically interrelated (without the artificial division of studies into the diffusion limited regime (DLR) and the surface limited regime (SLR)).

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Multichannel diffusion vs TDS model on example of energy spectra of bound hydrogen in 34CrNiMo6 steel after a typical heat treatment

Cited by 37 publications

References 42 publications

Study on the combination of cobalt-based superalloy and ferrous alloys by bimetal-layer surfacing technology in refabrication of large hot forging dies

Study on the combination of cobalt-based superalloy and ferrous alloys by bimetal-layer surfacing technology in refabrication of large hot forging dies

Boundary layer of hydrogen concentration under plastic deformation

The Inverse Problem of Identification of Hydrogen Permeability Model

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