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Title: | Gradient changes in structural condition of the B2 phase of NiTi surface layers after electron-beam treatments |
Authors: | Meisner, Ludmila Gudimova, Ekaterina Ostapenko, Marina Gennadievna Lotkov, Aleksandr |
Keywords: | структурные состояния; поверхностные слои; сплавы; рентгеновская дифракция; электронные пучки; электронно-лучевая обработка |
Issue Date: | 2014 |
Publisher: | AIP Publishing |
Citation: | Gradient changes in structural condition of the B2 phase of NiTi surface layers after electron-beam treatments / L. L. Meisner [et al.] // AIP Conference Proceedings. — 2014. — Vol. 1623 : International Conference on Physical Mesomechanics of Multilevel Systems 2014, Tomsk, Russia, 3–5 September 2014 : [proceedings]. — [P. 407-410]. |
Abstract: | Structural conditions of the B2 phase of the Ti[49.5]Ni50.5] alloy surface layers before and after electron-beam treatments (pulse duration [tau]=150 [mu]s, number of pulses n=5, beam energy density E<=20 J/cm{2}) were studied by X-ray diffraction analysis. Analysis of the X-ray patternsdemonstrates 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 phase in the underlying layer ( a[B2]=3.0159+=0.0005 ). The values of lattice parameter of phase B2{surf} amounted a{surf}[B2]=3.0316+=0.0005 Å and a{surf}[B2]=3.0252+=0.0005 Å, for the specimens after electron-beam treatment at E[1]=15 J/cm{2} and E[2] =20 J/cm{2}, respectively. Inflated lattice parameters a{surf}[B2] 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. |
URI: | http://earchive.tpu.ru/handle/11683/35728 |
Appears in Collections: | Материалы конференций |
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