Surface doping of steel with an intense pulsed electron beam

Gennadii Volokitin, Yurii Ivanov, Anatolii Klopotov, Anton Teresov, Vladimir Shugurov, Elizaveta Petrikova, Olga Ivanova

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Surface doping of AISI420 steel is carried out in a single vacuum cycle, and consisted of spraying a thin (0.5 μm) film of Zr-Ti-Cu alloy by electric-arc sputtering of a cathode of the composition Zr-6 at.% Ti-6 at.% Cu, and the subsequent irradiation of the system “film (Zr-Ti-Cu alloy) / (AISI420 steel) substrate” with an intense pulsed electron beam. It is shown that the concentration of zirconium in the surface layer of steel decreases with an increase in the energy density of the electron beam (ES). It is established that formation of a surface alloy is accompanied by the following: formation of a cellular crystallization structure (the average cell size increases from 150 nm at ES = 20 J/cm2 to 370 nm at ES = 40 J/cm2); formation of a dendritic crystallization structure in the presence of refractory element particles (titanium or zirconium); decomposition of a solid solution with the release of zirconium carbide particles (particle sizes increase from (10-15) nm at ES = 20 J/cm2 to (30-40) nm at ES = 40 J/cm2). Particles of the carbide phase based on chromium of the composition Cr3C2, Cr7C3 and (Cr, Fe)23С6, along with zirconium carbide particles, are revealed upon the irradiation of the system “film (Zr-Ti-Cu alloy) / (AISI420 steel) substrate” with an intense pulsed electron beam (ES = 40 J/cm2). Chromium carbide particles have a round shape; their sizes vary from 40 nm to 60 nm. The analysis of phase transformation diagrams taking place under equilibrium conditions in systems Fe-Zr-C; Cr-Zr-C; Fe-Cr-Zr is carried out. It is established that ultra-high cooling rates that occur during the irradiation of the system “film (Zr-Ti-Cu alloy) / (AISI420 steel) substrate” with an intense pulsed electron beam impose restrictions on formation of phases of the intermetallic type. It is suggested that formation of predominantly carbide phases in the surface layer of the material is conditioned upon high mobility of carbon atoms in steel.

Original languageEnglish
Title of host publicationRadiation-Thermal Effects and Processes in Inorganic Materials
EditorsSergey Gyngazov
PublisherTrans Tech Publications Ltd
Pages95-100
Number of pages6
ISBN (Print)9783035714500
DOIs
Publication statusPublished - 1 Jan 2018
Event13th International Conference on Radiation-Thermal Effects and Processes in Inorganic Materials, RTEP 2017 - Tomsk, Russian Federation
Duration: 9 Oct 201714 Oct 2017

Publication series

NameKey Engineering Materials
Volume781 KEM
ISSN (Print)1013-9826

Conference

Conference13th International Conference on Radiation-Thermal Effects and Processes in Inorganic Materials, RTEP 2017
CountryRussian Federation
CityTomsk
Period9.10.1714.10.17

Keywords

  • AISI420 steel
  • Film-substrate system
  • Low-energy high-current electron beams
  • Properties
  • Structure
  • Surface doping
  • Thin film of Zr-Ti-Cu alloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Volokitin, G., Ivanov, Y., Klopotov, A., Teresov, A., Shugurov, V., Petrikova, E., & Ivanova, O. (2018). Surface doping of steel with an intense pulsed electron beam. In S. Gyngazov (Ed.), Radiation-Thermal Effects and Processes in Inorganic Materials (pp. 95-100). (Key Engineering Materials; Vol. 781 KEM). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.781.95