Magnetic properties of nickel-titanium alloy during martensitic transformations under plastic and elastic deformation
Kveglis L.I. Noskov F.M. Volochaev M.N. Nyavro A.V. Filarowski A.
April 2021MDPI AG
Symmetry
2021#13Issue 4
This paper focuses on the processes of the occurrence of magnetization during structure formation in samples of Ni51 Ti49 alloy under deformation conditions. The possibility of the existence of a phase with an FCC (face-centered cubic) lattice in titanium nickelide has been demonstrated by electron microscopy and electron diffraction. It has been discovered that the interplanar distances of BCC110 (body-centered cubic), FCC111, and HCP002 (hexagonal close packed) in the alloy under study have similar values, which indicates the possibility of their mutual polymorphic transformation. Based on the modular self-organization, a scheme of martensitic transformations in titanium nickelide from the B2 structure (BCC lattice) to the B19’ structure (HCP lattice) through an intermediate phase with an FCC lattice is proposed. It is shown that lenticular crystals appear in the Ni51 Ti49 alloy under tensile deformation until rupture, which is accompanied by the onset of ferromagnetism. The effect of magnetization in Ni51 Ti49 samples when immersed in liquid nitrogen has been also discovered. In this case, the reason for the appearance and disappearance of magnetization can be associated with microdeformation processes caused by direct and reverse martensitic transitions that occur during cooling and heating of the samples.
Clusters , Deformation , Electron diffraction , Ferro-magnetism , Martensitic transformation , Titanium nickelide
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Polytechnical Institute of Siberian Federal University, Svobodny Ave. 79, Krasnoyarsk, 660041, Russian Federation
Physics Department, Amanjolov East Kazakhstan University, 30th Guards Division Str. 34, Ust-Kamenogorsk, 070002, Kazakhstan
Kirensky Institute of Physics, Siberian Division of Russian Academy of Science, Akademgorodok 50, Krasnoyarsk, 660036, Russian Federation
National Research, Tomsk State University, Lenin Ave. 36, Tomsk, 634050, Russian Federation
Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie Str., Wrocław, 50-383, Poland
Center for Advanced Research and Innovation, Industrial University of Tyumen, Volodarsky Str. 38, Tyumen, 625000, Russian Federation
Polytechnical Institute of Siberian Federal University
Physics Department
Kirensky Institute of Physics
National Research
Faculty of Chemistry
Center for Advanced Research and Innovation
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