Fatigue life improvement of 12Cr1MoV steel by irradiation with Zr<sup>+</sup> ion beam

S. V. Panin, I. V. Vlasov, Victor Petrovich Sergeev, P. O. Maruschak, Ramasubbu Sunder, B. B. Ovechkin

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Abstract

Cyclic tension and bend tests were performed on heat-resistant 12Cr1MoV steel specimens in as-supplied condition as well as after Zr<sup>+</sup> ion beam surface irradiation. Distinct differences in strain induced relief, as well in cracking pattern of modified surface layer were observed by optical microscopy and interference profilometry. Changes in subsurface layer are characterized by means of nano- and microindentation and fractography of fracture surfaces (with the help of scanning electron microscopy). It is shown that the main influence on mechanical properties is mostly induced by thermal treatment during irradiation rather than formation of a 2 μm thick layer doped with Zr. The differences in deformation behavior may be explained by physical mesomechanics concepts.

Original languageEnglish
Pages (from-to)3-10
Number of pages8
JournalInternational Journal of Fatigue
Volume76
DOIs
Publication statusPublished - 2015

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Keywords

  • Fatigue durability
  • Fracture
  • Ion beam irradiation
  • Multiple cracking
  • Surface nanostructuring

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Modelling and Simulation

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