Phase composition in NiTi near-surface layers after electron beam treatment and its variation depending on beam energy density

Marina G. Ostapenko, Ludmila L. Meisner, Aleksandr I. Lotkov, Ekaterina Y. Gudimova

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

Abstract

In the work, we study the mechanisms of structural phase state formation in NiTi surface layers after lowenergy pulsed electron beam irradiation depending on the electron beam energy density. It is revealed that after electron beam treatment of the NiTi specimens at energy densities E1 = 15 J/cm2, E2 = 20 J/cm2, and E3 = 30 J/cm2, a series of effects is observed: The absence of the Ti2Ni phase and the presence of new peaks correspond to the B19′ martensite phase with monoclinic structure. Estimation of the relative volume content of the B2 and B19′ phases from the total intensity of their peaks shows that the percentage of the martensite phase increases from ∼5 vol.% in the NiTi specimen irradiated at E1 = 15 J/cm2 to ∼80 vol.% in the NiTi specimen irradiated at E3 = 30 J/cm2. It is found that in the NiTi specimens irradiated at E ≤ 20 J/cm2, the layer that contains a martensite phase resides not on the surface but at some depth from it.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
PublisherAmerican Institute of Physics Inc.
Pages451-454
Number of pages4
Volume1623
ISBN (Print)9780735412606
DOIs
Publication statusPublished - 2014
EventInternational Conference on Physical Mesomechanics of Multilevel Systems 2014 - Tomsk, Russian Federation
Duration: 3 Sep 20145 Sep 2014

Other

OtherInternational Conference on Physical Mesomechanics of Multilevel Systems 2014
CountryRussian Federation
CityTomsk
Period3.9.145.9.14

    Fingerprint

Keywords

  • B19′ martensite phase
  • B2 phase
  • Low-energy high-current electron beams
  • Nickel-titanium alloy
  • Residual stresses
  • Structural phase states
  • X-ray diffraction analysis

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Ostapenko, M. G., Meisner, L. L., Lotkov, A. I., & Gudimova, E. Y. (2014). Phase composition in NiTi near-surface layers after electron beam treatment and its variation depending on beam energy density. In AIP Conference Proceedings (Vol. 1623, pp. 451-454). American Institute of Physics Inc.. https://doi.org/10.1063/1.4898979