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Thermoelastic martensitic transformations, mechanical properties, and shape-memory effects in rapidly quenched Ni45Ti32Hf18Cu5 alloy in the ultrafine-grained state

Authors
  • Pushin, V. G.1, 2
  • Pushin, A. V.1
  • Kuranova, N. N.1
  • Kuntsevich, T. E.1, 2
  • Uksusnikov, A. N.1
  • Dyakina, V. P.1
  • Kourov, N. I.1
  • 1 Russian Academy of Sciences, Mikheev Institute of Metal Physics, Ural Branch, ul. S. Kovalevskoi 18, Ekaterinburg, 620990, Russia , Ekaterinburg (Russia)
  • 2 The First President of Russia B. N. Yeltsin Ural Federal University (UrFU), ul. Mira 19, Ekaterinburg, 620002, Russia , Ekaterinburg (Russia)
Type
Published Article
Journal
The Physics of Metals and Metallography
Publisher
Pleiades Publishing
Publication Date
Dec 15, 2016
Volume
117
Issue
12
Pages
1261–1269
Identifiers
DOI: 10.1134/S0031918X16120115
Source
Springer Nature
Keywords
License
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Abstract

Methods of transmission and scanning electron microscopy and chemical microanalysis, electron diffraction, and X-ray diffraction were used to study the structure and the chemical and phase composition of ribbons of the four-component quasi-binary alloy Ni45Ti32Hf18Cu5. The influence of the synthesis regimes and subsequent heat treatment of the alloy on the formation of the amorphized state and ultrafine-grained structure has been determined. The critical temperatures of the devitrification and of the B2 ↔ B19' thermoelastic martensitic transformation have been established based on the data of the temperature dependences of the electrical resistivity. The lattice parameters of the B2 and B19' phases and the (Ti,Hf)2Ni phase have been determined by X-ray diffraction. The mechanical properties of the alloy were determined in tensile tests, and the shape-memory effects in the ribbons of the alloy were measured using bending tests.

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