Martensitic Transformation in Co-Based Ferromagnetic Shape Memory Alloy

• Authors: J. Kopeček , F. Yokaichiya , F. Laufek , M. Jarošová , K. Jurek , J. Drahokoupil , S. Sedláková-Ignácová , P. Molnár , O. Heczko
• Languages of publication: EN

Abstracts

EN

The Co_{38}Ni_{33}Al_{29} alloy in both powder and bulk state was investigated in the presented study using neutron diffraction on E9 high resolution powder diffractometer at HZB (BER II). The reverse martensitic phase transformation from the tetragonal martensitic phase into the cubic austenitic phase was observed with the phase coexistence within the temperatures from 183 K to 133 K. The fcc cobalt solid solution particles distributed in the transforming matrix remained in the same state through the whole temperature range. The obtained results agree with magnetization measurements on the same annealed sample. The powder data are compared with experiments on bulk sample, although there was a texture present. The obtained results provide further information about the phase transition process in this important class of ferromagnetic shape memory alloys.

Keywords

EN

78.40.Kc; 61.05.fm; 81.30.Kf; 81.40.Ef

Discipline

• 81.40.Ef: Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization
• 61.05.fm: Neutron diffraction
• 78.40.Kc: Metals, semimetals, and alloys
• 81.30.Kf: Martensitic transformations

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 3
• Pages: 475-477

Dates

published

2012-09

Contributors

author

J. Kopeček

• Institute of Physics of the AS CR, Na Slovance 2, 182 21 Praha, Czech Republic

author

F. Yokaichiya

• Laboratório Nacional de Luz Síncrotron, Campinas, Brazil
• Helmholtz-Zentrum Berlin, Hahn-Meitner-Platz 1, 14109 Berlin, Germany

author

F. Laufek

• Czech Geological Survey, Geologická 6, 152 00 Praha 5, Czech Republic

author

M. Jarošová

• Institute of Physics of the AS CR, Cukrovarnická 10/112, 162 00 Praha, Czech Republic

author

K. Jurek

• Institute of Physics of the AS CR, Cukrovarnická 10/112, 162 00 Praha, Czech Republic

author

J. Drahokoupil

• Institute of Physics of the AS CR, Na Slovance 2, 182 21 Praha, Czech Republic

author

S. Sedláková-Ignácová

• Institute of Physics of the AS CR, Na Slovance 2, 182 21 Praha, Czech Republic

author

P. Molnár

• Institute of Physics of the AS CR, Na Slovance 2, 182 21 Praha, Czech Republic

author

O. Heczko

• Institute of Physics of the AS CR, Na Slovance 2, 182 21 Praha, Czech Republic

References

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• [7] Yu.I. Chumlyakov, I.V. Kireeva, E.Yu. Panchenko, E.E. Timofeeva, Z.V. Pobedennaya, S.V. Chusov, I. Karaman, H. Maier, E. Cesari, V.A. Kirillov, Russ. Phys. J. 51, 1016 (2008)
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Identifiers

DOI

10.12693/APhysPolA.122.475