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

Abstract

Structural conditions of the B2 phase of the Ti_49.5Ni_50.5 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 B2^surf structure. It is revealed that the lattice parameter of the B2^surf phase in the surface (modified) layer is also higher than the lattice parameter of the B2^surf phase in the underlying layer (α_B2 = 3.0159 ± 0.0005). The values of lattice parameter of phase B2^surf amounted α_B2 surf = 3.0316 ± 0.0005 Å and α_B2 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.

Original language	English
Title of host publication	AIP Conference Proceedings
Publisher	American Institute of Physics Inc.
Pages	407-410
Number of pages	4
Volume	1623
ISBN (Print)	9780735412606
DOIs	https://doi.org/10.1063/1.4898968
Publication status	Published - 2014
Event	International Conference on Physical Mesomechanics of Multilevel Systems 2014 - Tomsk, Russian Federation Duration: 3 Sep 2014 → 5 Sep 2014

Other

Other	International Conference on Physical Mesomechanics of Multilevel Systems 2014
Country	Russian Federation
City	Tomsk
Period	3.9.14 → 5.9.14

Keywords

B2 phase
Electron-beam treatments
NiTi
Structural phase states
X-ray diffraction analysis

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.4898968

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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. In AIP Conference Proceedings (Vol. 1623, pp. 407-410). American Institute of Physics Inc.. https://doi.org/10.1063/1.4898968

Gradient changes in structural condition of the B2 phase of NiTi surface layers after electron-beam treatments. / Meisner, Ludmila L.; Gudimova, Ekaterina Yu; Ostapenko, Marina G.; Lotkov, Aleksandr I.

AIP Conference Proceedings. Vol. 1623 American Institute of Physics Inc., 2014. p. 407-410.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Meisner, LL, Gudimova, EY, Ostapenko, MG & Lotkov, AI 2014, Gradient changes in structural condition of the B2 phase of NiTi surface layers after electron-beam treatments. in AIP Conference Proceedings. vol. 1623, American Institute of Physics Inc., pp. 407-410, International Conference on Physical Mesomechanics of Multilevel Systems 2014, Tomsk, Russian Federation, 3.9.14. https://doi.org/10.1063/1.4898968

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

abstract = "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 {\AA} and αB2 surf = 3.0252 ± 0.0005 {\AA}, 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.",

keywords = "B2 phase, Electron-beam treatments, NiTi, Structural phase states, X-ray diffraction analysis",

author = "Meisner, {Ludmila L.} and Gudimova, {Ekaterina Yu} and Ostapenko, {Marina G.} and Lotkov, {Aleksandr I.}",

year = "2014",

doi = "10.1063/1.4898968",

language = "English",

isbn = "9780735412606",

volume = "1623",

pages = "407--410",

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publisher = "American Institute of Physics Inc.",

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T1 - Gradient changes in structural condition of the B2 phase of NiTi surface layers after electron-beam treatments

AU - Meisner, Ludmila L.

AU - Gudimova, Ekaterina Yu

AU - Ostapenko, Marina G.

AU - Lotkov, Aleksandr I.

PY - 2014

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N2 - 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.

AB - 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.

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