TEM Study of Ni-Mn-Co-In Ferromagnetic Shape Memory Alloys

Krystian Prusik; Katarzyna Bałdys; Danuta Stróż

doi:10.4028/www.scientific.net/SSP.186.271

Paper Titles

TEM Study of Quasicrystals in Al-Mn-Fe Melt-Spun Ribbon
p.255

Structure of Nitride and Nitride/Oxide Layers Formed on NiTi Alloy
p.259

Positive Hydrogen Effect in Structure Surface Layers on Ti Alloy
p.263

Electron Microscopy Investigation of Ageing Behavior in a Cu–Ni–Si Alloy
p.267

TEM Study of Ni-Mn-Co-In Ferromagnetic Shape Memory Alloys
p.271

Tin Pest and Tin Oxidation on Tin-Rich Lead-Free Alloys Investigated by Electron Microscopy Methods
p.275

Structural and Mechanical Features of Rapidly Solidified Al-2Fe-2Ni-5Mg Alloy
p.279

VM12 Steel for Advanced Power Generation Plants – Metrology of the Precipitates by Electron Microscopy
p.283

Microstructural Investigation of the Ferritic GX12CrMoVNbN9-1 (GP91) Cast Steel
p.287

HomeSolid State PhenomenaSolid State Phenomena Vol. 186TEM Study of Ni-Mn-Co-In Ferromagnetic Shape...

TEM Study of Ni-Mn-Co-In Ferromagnetic Shape Memory Alloys

Abstract:

Ferromagnetic shape memory alloys (FSMA) are relatively new smart materials group. Recently, new FSMA from NiMnX (X=Sb, Sn, In, Co+In) systems are considered as alternative to the well known NiMnGa alloys. Four alloys of the following compositions: Ni₄₃Mn₃₅Co₄In₁₈, Ni₄₁Mn₃₅Co₄In₂₀, Ni₄₂Mn₃₅Co₅In₁₈, Ni₄₀Mn₃₅Co₅In₂₀ were studied in order to determine microstructure, phase composition and martensitic transformation temperatures versus their chemical composition. Structure of the alloys was studied by optical and transmission electron microscopy (TEM). All of the studied alloys showed macrostructure consisting of radially oriented columnar grains in the direction perpendicular to the casting axis. The structure of the phases occurred in the studied alloys depended on the cobalt and indium content. For the alloys containing 20 at. % of In at room temperature only L2₁ parent phase was observed whereas for those containing 18 at. % of In either single phase 14M modulated martensite or mixture of 14M martensite and L2₁ parent phase were seen. DSC measurements showed in studied alloys single-state martensitic transformation. Decrease In content of 2 at.% caused about 80°C fall of martensitic transformation temperatures. Curie temperature T_c increases of 20°C with 1 at% rise of the cobalt content.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Solid State Phenomena (Volume 186)

Pages:

271-274

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.186.271

Citation:

Cite this paper

Online since:

March 2012

Authors:

Krystian Prusik, Katarzyna Bałdys, Danuta Stróż

Keywords:

Martensitic Structure, Ni-Mn-Co-in Ferromagnetic Shape Memory Alloys (FSMA), Transmission Electron Microscopy (TEM)

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] K. Bałdys, G. Dercz, Ł. Madej: Novel Materials: Coats and Nanoengineering, Vol. 674 (2011), pp.171-176.

Google Scholar

[2] A. Sozinov, A.A. Likhachev, N. Lanska, K. Ullakko: Appl. Phys. Lett., Vol. 80 (2002), pp.1746-1748.

DOI: 10.1063/1.1458075

Google Scholar

[3] R. Kainuma, Y. Imano, W. Ito, Y. Sutou, H. Morito, S. Okamoto, O. Kitakami, K. Oikawa, A. Fujita, T. Kanomata, K. Ishida: Nature, Vol. 439 (2006), p.957–960.

DOI: 10.1038/nature04493

Google Scholar

[4] K. Oikawa, Y. Imano, V.A. Chernenko, F. Luo, T. Omori, Y. Sutou, R. Kainuma, T. Kanomata, K. Ishida: Mat. Trans., Vol. 46, No. 3 (2005), pp.734-737.

DOI: 10.2320/matertrans.46.734

Google Scholar

[5] Y.D. Wang, E.W. Huang, Y. Ren, Z.H. Nie, G. Wang, Y.D. Liu, J.N. Deng, H. Choo, P.K. Liaw, D.E. Brown, L. Zuo: Acta Materialia, Vol. 56 (2008), p.913–923.

DOI: 10.1016/j.actamat.2007.10.045

Google Scholar