Electron-ion-plasma modification of the structure and properties of commercial steels

Yury Fedorovich Ivanov, A. A. Klopotov, A. I. Potekaev, N. Koval, V. Vlasov

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Abstract

The work is devoted to the structural-phase analysis of steels of the austenitic and martensitic grade, irradiated with a high-intensity pulsed electron beam of the submillisecond duration of exposure in the mode of the surface layer melting. A thermodynamic analysis of phase transformations occurring during heat treatment in alloys of the composition Fe-Cr-C and Fe-Cr-Ni-C, which are the basis of steels 20X13 and 12X18H10T, is carried out. It is shown that formation of solid solutions on the basis of α-iron (BCC crystalline lattice) and γ-iron (FCC crystalline lattice) as well as the entire range of carbide phases of a complex elemental composition (M23C6, M7C3 HM3C, where symbol M refers to atoms of metallic elements Fe, Cr, and Ni) is possible in equilibrium conditions in given materials. The irradiation of steels 12X18H10T and 20X13 with a high-intensity pulsed electron beam of the submillisecond duration of exposure is carried out. It is shown that the electron-beam processing of steel in the melting mode and the subsequent rapid crystallization is accompanied by a significant transformation of the surface layer structure, consisting in complete dissolution of original carbide phase particles; in formation of dendritic crystallization cells of submicron sizes; in occurrence of martensitic γ→α and γ→ϵ transformation; in re-allocation of nanosized particles of carbide and intermetallic phases.

Original languageEnglish
Article number012070
JournalIOP Conference Series: Materials Science and Engineering
Volume168
Issue number1
DOIs
Publication statusPublished - 7 Feb 2017

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ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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