Reactive Stresses and Burst Character of Shape Memory Deformation in Single Crystals Cu-Al-Ni and Ni-Fe-Ga Single Crystals

Vladimir I. Nikolaev; Gennady A. Malygin; Serguey A. Pulnev; Pavel N. Yakushev; Victor M. Egorov

doi:10.4028/www.scientific.net/MSF.738-739.51

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HomeMaterials Science ForumMaterials Science Forum Vols. 738-739Reactive Stresses and Burst Character of Shape...

Reactive Stresses and Burst Character of Shape Memory Deformation in Single Crystals Cu-Al-Ni and Ni-Fe-Ga Single Crystals

Abstract:

Abstract. The paper is a presentation of two new phenomena which have been recently revealed and investigated by authors in well-known shape memory alloys such as Cu-Al-Ni and Ni-Fe-Ga. The first is a strong decrease of the martensitic transfornation heat evolved (absorbed) in single crystals of Cu-13.5 wt. % Al - 4.0 wt. % Ni alloy in the course of their in-situ calorimetric study under constrained shape memory deformation conditions. The second is a burst character of emerg-ing shape memory strain in the course of heating single crystals of Ni₄₉Fe₂₇Ga₁8Co_{Subscript text}6 ferromagnetic alloy. The crystals were preliminary compressed along [110] crystallographic axis for the purpose of giving them a shape memory deformation. As a result of burst martensitic transition, the monocrystalline samples standing on a hard base and loaded additional weight of 400 g threw up this weight on 66 mm height .

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Periodical:

Materials Science Forum (Volumes 738-739)

Pages:

51-55

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.738-739.51

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Online since:

January 2013

Authors:

Vladimir I. Nikolaev, Gennady A. Malygin, Serguey A. Pulnev, Pavel N. Yakushev, Victor M. Egorov

Keywords:

Burst Martensitic Transition, Reactive Stresses, Shape Memory Deformation

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References

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