Nanocrystalline structure formation in EK-181 steel surface layers on ultrasonic treatment

A. V. Panin, E. A. Melnikova, O. B. Perevalova, Yu I. Pochivalov, M. V. Leontyeva-Smirnova, V. M. Chernov, Yu F. Ivanov

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Abstract

The microstructure and the phase composition of surface layers of ferritic-martensitic EK-181 steel (Fe-12Cr-2W-V-Ta-B-C) subjected to various combinations of ultrasonic and heat treatment were examined. It is shown that a nanocrystalline a-phase structure with grain boundaries on which vanadium carbide particles precipitate is formed only on intermediate ultrasonic treatment between quenching and ageing. The intermediate ultrasonic treatment provides the greatest increase in the yield limit of the test specimens under uniaxial tension. A correlation is found between the microstructure, the mechanical characteristics and the fracture mode.

Original languageEnglish
Pages (from-to)150-159
Number of pages10
JournalPhysical Mesomechanics
Volume12
Issue number3-4
DOIs
Publication statusPublished - 2009

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Keywords

  • fracture fractography
  • mechanical properties
  • microstructure
  • phase composition
  • surface nanostructuring

ASJC Scopus subject areas

  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Panin, A. V., Melnikova, E. A., Perevalova, O. B., Pochivalov, Y. I., Leontyeva-Smirnova, M. V., Chernov, V. M., & Ivanov, Y. F. (2009). Nanocrystalline structure formation in EK-181 steel surface layers on ultrasonic treatment. Physical Mesomechanics, 12(3-4), 150-159. https://doi.org/10.1016/j.physme.2009.07.007