High-temperature superelasticity in CoNiGa, CoNiAl, NiFeGa, and TiNi monocrystals

The influence of the crystal orientation on the thermoelastic martensitic transformations developing under load was investigated for Co 49 Ni 21 Ga 30 , Co 40 Ni 33 Al 27 , Co 35 Ni 35 Al 30 , Ni 54 Fe 19 Ga 27 , and Ti 49.4 Ni 50.6 (аt. %) monocrystals. It has been shown that the superelastic tempe...

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Bibliographic Details
Published in:Russian physics journal 2008-10, Vol.51 (10), p.1016-1036
Main Authors: Chumlyakov, Yu. I., Kireeva, I. V., Panchenko, E. Yu, Timofeeva, E. E., Pobedennaya, Z. V., Chusov, S. V., Karaman, I., Maier, H., Cesari, E., Kirillov, V. A.
Format: Article
Language:English
Subjects:
Condensed Matter Physics
Hadrons
Heavy Ions
Lasers
Mathematical and Computational Physics
Nuclear Physics
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Theoretical
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Summary:The influence of the crystal orientation on the thermoelastic martensitic transformations developing under load was investigated for Co 49 Ni 21 Ga 30 , Co 40 Ni 33 Al 27 , Co 35 Ni 35 Al 30 , Ni 54 Fe 19 Ga 27 , and Ti 49.4 Ni 50.6 (аt. %) monocrystals. It has been shown that the superelastic temperature range depends on the crystal orientation and reaches a maximum for [001]-oriented crystals. In monophase crystals of Co 49 Ni 21 Ga 30 , Co 40 Ni 33 Al 27 , Co 35 Ni 35 Al 30 , and Ni 54 Fe 19 Ga 27 (at. %), segregation of dispersion particles takes place at test temperatures T >  623 K. A criterion for high-temperature superelasticity has been proposed which implies the attainment of high strength of the high-temperature phase due to a proper choice of the crystal orientation, deviation from stoichiometry, and segregation of dispersion particles.
ISSN:1064-8887
1573-9228
DOI:10.1007/s11182-009-9143-5