Mechanical behavior of Ti-Ta-based surface alloy fabricated on TiNi SMA by pulsed electron-beam melting of film/substrate system

The physical-mechanical properties of the Ti-Ta based surface alloy with thickness up to ∼2 μm fabricated through the multiple (up to 20 cycles) alternation of magnetron deposition of Ti70Ta30 (at.%) thin (50 nm) films and their liquid-phase mixing with the NiTi substrate by microsecond low-energy,...

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Published in:Applied surface science Vol. 437. P. 217-226
Other Authors: Yakovlev, Evgeny V., Semin, Viktor O., Meisner, Lyudmila L., Rotshtein, Vladimir P., Neiman, Alexey A., Dyachenko, F. A, Meisner, Stanislav N.
Format: Article
Language:English
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Online Access:http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000723512
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024 7 |a 10.1016/j.apsusc.2017.12.107  |2 doi 
035 |a to000723512 
039 9 |a 202009021622  |c 202008311403  |d VLOAD  |y 202008311355  |z Александр Эльверович Гилязов 
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245 1 0 |a Mechanical behavior of Ti-Ta-based surface alloy fabricated on TiNi SMA by pulsed electron-beam melting of film/substrate system  |c S. N. Meisner, E. V. Yakovlev, V. O. Semin [et al.] 
504 |a Библиогр.: 37 назв. 
520 3 |a The physical-mechanical properties of the Ti-Ta based surface alloy with thickness up to ∼2 μm fabricated through the multiple (up to 20 cycles) alternation of magnetron deposition of Ti70Ta30 (at.%) thin (50 nm) films and their liquid-phase mixing with the NiTi substrate by microsecond low-energy, high current pulsed electron beam (LEHCPEB: ≤15 keV, ∼2 J/cm2) are presented. Two types of NiTi substrates (differing in the methods of melting alloys) were pretreated with LEHCPEB to improve the adhesion of thin-film coating and to protect it from local delimitation because of the surface cratering under pulsed melting. The methods used in the research include nanoindentation, transmission electron microscopy, and depth profile analysis of nanohardness, Vickers hardness, elastic modulus, depth recovery ratio, and plasticity characteristic as a function of indentation depth. For comparison, similar measurements were carried out with NiTi substrates in the initial state and after LEHCPEB pretreatment, as well as on "Ti70Ta30(1 μm) coating/NiTi substrate" system. It was shown that the upper surface layer in both NiTi substrates is the same in properties after LEHCPEB pretreatment. Our data suggest that the type of multilayer surface structure correlates with its physical-mechanical properties. For NiTi with the Ti-Ta based surface alloy ∼1 μm thick, the highest elasticity falls on the upper submicrocrystalline layer measuring ∼0.2 μm and consisting of two Ti-Ta based phases: α'' martensite (a = 0.475 nm, b = 0.323 nm, c = 0.464 nm) and β austenite (a = 0.327 nm). Beneath the upper layer there is an amorphous sublayer followed by underlayers with coarse (>20 nm) and fine (<20 nm) average grain sizes which provide a gradual transition of the mechanical parameters to the values of the NiTi substrate. 
653 |a тонкие пленки 
653 |a импульсные электронные пучки 
653 |a аморфные и нанокристаллические структуры 
653 |a механическое поведение 
653 |a поверхностные сплавы 
655 4 |a статьи в журналах  |9 879358 
700 1 |a Yakovlev, Evgeny V.  |9 480961 
700 1 |a Semin, Viktor O.  |9 456757 
700 1 |a Meisner, Lyudmila L.  |9 100336 
700 1 |a Rotshtein, Vladimir P.  |9 487649 
700 1 |a Neiman, Alexey A.  |9 99823 
700 1 |a Dyachenko, F. A  |9 498505 
700 1 |a Meisner, Stanislav N.  |9 418610 
773 0 |t Applied surface science  |d 2018  |g Vol. 437. P. 217-226  |x 0169-4332 
852 4 |a RU-ToGU 
856 4 |u http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000723512 
856 |y Перейти в каталог НБ ТГУ  |u https://koha.lib.tsu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=469763 
908 |a статья 
999 |c 469763  |d 469763