Gradient changes in structural condition of the B2 phase of NiTi surface layers after electron-beam treatments

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

Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

Аннотация

Structural conditions of the B2 phase of the Ti49.5Ni50.5 alloy surface layers before and after electron-beam treatments (pulse durationτ = 150 μs, number of pulses n = 5, beam energy density E≥ 20 J/cm2) were studied by X-ray diffraction analysis. Analysis of the X-ray patterns demonstrates that surface layers modified by electron beam treatment contain phase with B2surf structure. It is revealed that the lattice parameter of the B2surf phase in the surface (modified) layer is also higher than the lattice parameter of the B2surf phase in the underlying layer (αB2 = 3.0159 ± 0.0005). The values of lattice parameter of phase B2surf amounted αB2 surf = 3.0316 ± 0.0005 Å and αB2 surf = 3.0252 ± 0.0005 Å, for the specimens after electron-beam treatment at E1 = 15 J/cm2 and E2 = 20 J/cm2, respectively. Inflated lattice parameters α B2 surf surf are associated with changes in the chemical composition and the presence of residual stresses in the surface region of the samples after electron-beam treatments.

Язык оригиналаАнглийский
Название основной публикацииAIP Conference Proceedings
ИздательAmerican Institute of Physics Inc.
Страницы407-410
Число страниц4
Том1623
ISBN (печатное издание)9780735412606
DOI
СостояниеОпубликовано - 2014
СобытиеInternational Conference on Physical Mesomechanics of Multilevel Systems 2014 - Tomsk, Российская Федерация
Продолжительность: 3 сен 20145 сен 2014

Другое

ДругоеInternational Conference on Physical Mesomechanics of Multilevel Systems 2014
СтранаРоссийская Федерация
ГородTomsk
Период3.9.145.9.14

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Цитировать

    Meisner, L. L., Gudimova, E. Y., Ostapenko, M. G., & Lotkov, A. I. (2014). Gradient changes in structural condition of the B2 phase of NiTi surface layers after electron-beam treatments. В AIP Conference Proceedings (Том 1623, стр. 407-410). American Institute of Physics Inc.. https://doi.org/10.1063/1.4898968