Structure of the near-surface layer of NiTi on the meso- and microscale levels after ion-beam surface treatment

Using the EBSD, SEM and TEM methods, the structure of surface layer of polycrystalline NiTi alloy samples was examined after the modification of material surface by the pulsed action of mean-energy silicon ion beam. It was found that the ion beam treatment would cause grain fragmentation of the near...

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Bibliographic Details
Main Authors: Meisner, L L, Poletika, T M, Meisner, S N, Tverdichlebova, A V, Girsova, S L, Shulepov, I A
Format: Conference Proceeding
Language:English
Subjects:
ANISOTROPY
APPROXIMATIONS
BACKSCATTERING
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRON DIFFRACTION
FRAGMENTATION
Intermetallic compounds
ION BEAMS
LAYERS
NICKEL ALLOYS
Nickel base alloys
Nickel titanides
POLYCRYSTALS
SCANNING ELECTRON MICROSCOPY
SILICON IONS
Surface layers
Surface treatment
SURFACE TREATMENTS
SURFACES
TITANIUM ALLOYS
TRANSMISSION ELECTRON MICROSCOPY
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Summary:Using the EBSD, SEM and TEM methods, the structure of surface layer of polycrystalline NiTi alloy samples was examined after the modification of material surface by the pulsed action of mean-energy silicon ion beam. It was found that the ion beam treatment would cause grain fragmentation of the near-surface layer to a depth 5÷50 μm; a higher extent of fragmentation was observed in grains whose close-packed planes were oriented approximately in the same direction as the ion beam was. The effect of high-intensity ion beam treatment on the anisotropic behavior of polycrystalline NiTi alloy and the mechanisms involved were also examined.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4898970