Thumbnail
Access Restriction
Open

Author Meisner, Ludmila L. ♦ Semin, Viktor O. ♦ Gudimova, Ekaterina Y. ♦ Neiman, Alexey A. ♦ Lotkov, Alexander I. ♦ Ostapenko, Marina G. ♦ Koval, Nikolai N. ♦ Teresov, Anton D.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ MATERIALS SCIENCE ♦ BCC LATTICES ♦ CONCENTRATION RATIO ♦ DEPTH ♦ ELECTRON BEAMS ♦ ELECTRON DIFFRACTION ♦ ENERGY DENSITY ♦ LAYERS ♦ MELTING ♦ NICKEL ALLOYS ♦ PARTICLES ♦ PULSES ♦ SURFACES ♦ THICKNESS ♦ TITANIUM ALLOYS ♦ TRANSMISSION ELECTRON MICROSCOPY ♦ X RADIATION
Abstract By transmission electron microscopy method the evolution of structural-phase states on a depth of close to equiatomic NiTi modified layer has been studied. Modification performed by pulse impact on its surface low-energy high-current electron beam (beam energy density 10 J/sm{sup 2}, 10 pulses, pulse duration 50mks). It is established that during the treatment in the layer thickness of 8–10 μm, the melting of primary B2 phase and contained therein as Ti2Ni phase particles occurs. The result is change in the concentration ratio of titanium and nickel in the direction of increasing titanium content, which was confirmed by X-ray analysis in the form of increased unit cell parameter B2 phase. Analysis of the electron diffraction pattern showed that the modified layer is characterized as a highly distorted structure on the basis of bcc lattice. Lattice distortions are maximal near the surface and extends to a depth of melt. In subjacent layer there is gradual decline lattice distortions is observed.
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-10-27
Publisher Place United States
Volume Number 1683
Issue Number 1


Open content in new tab

   Open content in new tab