The Special Features of the Phase Formation and Distribution in the Titanium Nickelide Surface Layers Treated by Electron Beams

L. L. Meisner, M. G. Ostapenko, A. I. Lotkov, [No Value] Neyman

Research output: Contribution to journalArticle

Abstract

The special features inherent in the formation of the structural-phase states on the surface of titanium nickelide samples subjected to multiple low-energy high-current variable energy density pulsed electron beam irradiation are investigated. The parameters of the electron beam operated in the fivefold surface melting regime are as follows: pulse duration τ = 150 μs, current I = 70 А, and energy densities Е<inf>1</inf>, Е<inf>2</inf>, and E<inf>3</inf> = 15, 20, and 30 J/сm<sup>2</sup>, respectively. The surface layer structure was examined by methods of the x-ray diffraction analysis and transmission electron microscopy. It is found that in the irradiated TiNi samples with Е ≤ 20 J/сm<sup>2</sup>, the layer containing a martensite phase lies at a certain depth below the surface rather than on the surface. In the irradiated TiNi sample with E<inf>3</inf> = 30 J/сm<sup>2</sup>, the subsurface region is in a two-phase state (B2 + B19′), with the В19′ phase being predominant. It appears that the lower is the energy density, the smaller is the amount of the martensite phase.

Original languageEnglish
JournalRussian Physics Journal
DOIs
Publication statusAccepted/In press - 17 Sep 2015

Fingerprint

surface layers
titanium
electron beams
flux density
martensite
high current
pulse duration
x ray diffraction
melting
transmission electron microscopy
irradiation
energy

Keywords

  • B19′ martensite phase
  • high-temperature B2 phase
  • low-energy high-current electron beams
  • residual stresses
  • structural-phase states
  • surface layers
  • titanium nickelide
  • x-ray diffraction analysis

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

The Special Features of the Phase Formation and Distribution in the Titanium Nickelide Surface Layers Treated by Electron Beams. / Meisner, L. L.; Ostapenko, M. G.; Lotkov, A. I.; Neyman, [No Value].

In: Russian Physics Journal, 17.09.2015.

Research output: Contribution to journalArticle

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