REFINEMENT OF THE STRUCTURE OF THE TITANIUM NICKELIDE NEAR-SURFACE LAYERS AFTER SILICON ION MODIFICATION
https://doi.org/10.17073/0368-0797-2015-4-267-271
Abstract
Changes in the microstructure of the surface layer of NiTi after
pulse impacts on the alloy surface by medium energy silicon ion beams were investigated by the electron backscattered diffraction method. It was found that the surface layer was characterized by the presence of the martensitic phase В19′ within the fragmentation grain structure with the high concentration of phase and interphase boundaries, the linear fragment sizes exceeding 1 micron; grain fragmentation was inhomogeneous and depends on the crystallographic orientation of the initial grain. Internal structure of the one grain was fragmented by almost 1/3 of its volume, and in the other grain any signifi cant structural changes was not observed. The most heavily fragmented structure was observed in grains, which crystallographic orientation was close to the direction <111>, relative to the impact direction. The angles misorientation of the fragments was analyzed relative to the original crystallographic orientation B2 structure.
About the Authors
S. N. Meisner
Institute of Strength Physics and Materials Science SB RAS 2/4, Akademicheskii ave.,Tomsk, 634021, Russia
National Research Tomsk State University 36, Lenina str., Tomsk, 634050, Russia
Russian Federation
Cand. Sci. (Eng.), Junior Researcher
Russian Federation
Cand. Sci. (Eng.), Junior Researcher
L. L. Meisner
Institute of Strength Physics and Materials Science SB RAS 2/4, Akademicheskii ave.,Tomsk, 634021, Russia
National Research Tomsk State University 36, Lenina str., Tomsk, 634050, Russia
Russian Federation
Dr. Sci. (Phys.-math.), Professor, Chief Researcher
Russian Federation
Dr. Sci. (Phys.-math.), Professor, Chief Researcher
A. I. Lotkov
Institute of Strength Physics and Materials Science SB RAS 2/4, Akademicheskii ave.,Tomsk, 634021, Russia
Russian Federation
Russian Federation
Dr. Sci. (Phys.-math.), Professor, Deputy Director for scientifi c work
A. V. Tverdokhlebova
Institute of Strength Physics and Materials Science SB RAS 2/4, Akademicheskii ave.,Tomsk, 634021, Russia
Russian Federation
Postgraduate
Russian Federation
Postgraduate
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Review
For citations:
Meisner S.N., Meisner L.L., Lotkov A.I., Tverdokhlebova A.V. REFINEMENT OF THE STRUCTURE OF THE TITANIUM NICKELIDE NEAR-SURFACE LAYERS AFTER SILICON ION MODIFICATION. Izvestiya. Ferrous Metallurgy. 2015;58(4):267-271. (In Russ.) https://doi.org/10.17073/0368-0797-2015-4-267-271
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