Nanocrystallization of Metallic Surfaces with Using the Methods of Intense Plastic Deformation (Review)

Vasiliev, M. O.; Prokopenko, G.I.; Filatova, V.S.

doi:10.15407/ufm.05.03.345

Usp. Fiz. Met.

2004

DOI: 10.15407/ufm.05.03.345

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Nanocrystallization of Metallic Surfaces with Using the Methods of Intense Plastic Deformation (Review)

M. O. Vasiliev

G.I. Prokopenko

V.S. Filatova

Abstract: Îòòèñêè äîñòóïíû íåïîñðåäñòâåííî îò èçäàòåëÿ Ôîòîêîïèðîâàíèå ðàçðåøåíî òîëüêî â ñîîòâåòñòâèè ñ ëèöåíçèåé  2004 ÈÌÔ (Èíñòèòóò ìåòàëëîôèçèêè èì. Ã. Â. Êóðäþìîâà ÍÀÍ Óêðàèíû) Íàïå÷àòàíî â Óêðàèíå.

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Cited by 23 publications

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References 51 publications

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“…Thus, they combine high strength with elevated plasticity [1][2][3][4]. Moreover, severe plastic deformation is the most common method used for their production [5]. However, the same is also true for the surface NCS obtained by the mechanical-pulse treatment (MPT), i.e., by the severe thermoplastic deformation of the layers on cylindrical and plane surfaces caused by the high-speed friction of a special metal tool against the treated workpiece [6].…”

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Hydrogen Permeability of the Surface Nanocrystalline Structures of Carbon Steel

et al. 2015

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We studied the hydrogen permeability of the surface nanocrystalline structures formed by the mechanical-pulse treatment on 45 steel with the use of various technological media. It is shown that these structures are characterized by a much lower hydrogen permeability as compared with the untreated steel, thus revealing the formation of a large number of hydrogen traps in the course of treatment. The hardened surface layer is more susceptible to the development of dissipated damage in the course of hydrogenation but may also serve as a barrier for the penetration of hydrogen into the matrix material.The nanocrystalline structures (NCS) formed on structural steels are characterized by an improved complex of physicomechanical properties. Thus, they combine high strength with elevated plasticity [1][2][3][4]. Moreover, severe plastic deformation is the most common method used for their production [5]. However, the same is also true for the surface NCS obtained by the mechanical-pulse treatment (MPT), i.e., by the severe thermoplastic deformation of the layers on cylindrical and plane surfaces caused by the high-speed friction of a special metal tool against the treated workpiece [6]. To harden these surfaces, it is customary to perform MPT on the lathes or surface-grinding machines after their insignificant modernization. Special technological media (TM) are delivered to the zone of treatment. They not only rapidly cool the metal surface, which leads to its thermal treatment, but can also saturate the surface layers with alloying elements (carbon, nitrogen, hydrogen, oxygen, etc.) because their thermal destruction is realized in the zone of friction contact [7,8]. The high-speed heating above the point of phase transformations in the course of MPT and cooling as a result of heat removal into the TM, tool, and workpiece cause structural-phase transformations accompanied by the formation mainly of the martensite-austenitic structure. Thus, the MPT combines severe shear deformation (guaranteeing the formation of NCS), alloying with the components of cooling media, and the thermal treatment of the alloyed and highly deformed surface layer.As an important characteristic of the surface NCS, we can mention their resistance to hydrogen embrittlement [9] revealed by mobility of hydrogen in the metals and their ability to be hydrogenated [10]. On the other hand, we can also consider the surface layer as a barrier for the realization of negative processes in the matrix material. Therefore, it is reasonable to study the influence of surface NCS on the hydrogen brittleness of the base metal. Thus, in the present work, we investigate the hydrogen permeability of the surface NCS obtained on carbon steel in different TM.

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Hydrogen Permeability of the Surface Nanocrystalline Structures of Carbon Steel

et al. 2015

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Improvement of the wear resistance of medium-carbon steel by nanodispersion of surface layers

Kyryliv¹

2012

Mater Sci

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Nitriding of Steels in the Course of their Mechanical Pulsed Treatment

Kyryliv

2013

Mater Sci

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Nanocrystallization of Metallic Surfaces with Using the Methods of Intense Plastic Deformation (Review)

Cited by 23 publications

References 51 publications

Hydrogen Permeability of the Surface Nanocrystalline Structures of Carbon Steel

Hydrogen Permeability of the Surface Nanocrystalline Structures of Carbon Steel

Improvement of the wear resistance of medium-carbon steel by nanodispersion of surface layers

Nitriding of Steels in the Course of their Mechanical Pulsed Treatment

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