Hot Extrusion of Ni-Based Polycrystalline Ferromagnetic Shape Memory Alloys

Krystian Prusik; Katarzyna Reclik; Danuta Stróż; Tomasz Goryczka; Józef Lelątko; Wojciech Gurdziel

doi:10.4028/www.scientific.net/SSP.203-204.306

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HomeSolid State PhenomenaSolid State Phenomena Vols. 203-204Hot Extrusion of Ni-Based Polycrystalline...

Hot Extrusion of Ni-Based Polycrystalline Ferromagnetic Shape Memory Alloys

Abstract:

Two Ni-based (Ni-Mn-Ga and Ni-Mn-Co-In) ferromagnetic nonstoichiometric shape memory alloys were studied in order to determine the influence of hot extrusion process on macro, microstructure and texture of the studied alloys. The microstructure of the alloys in the as cast state and after extrusion was analyzed by electron backscatter diffraction technique. Typical microstructure of the as cast alloys consisted of radially oriented columnar grains elongated perpendicularly to the casting axis. For the alloys Ni-Mn-Ga and Ni-Mn-Co-In alloys the 10M and 14M modulated martensite were observed, respectively. After extrusion Ni-Mn-Ga samples revealed high density of fibre texture parallel to the extrusion axis. In spite of applying different extrusion parameters it was not possible to avoid cracks and overcome the brittleness of the Ni-Mn-Co-In alloys.

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Solid State Phenomena (Volumes 203-204)

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306-309

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.203-204.306

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Online since:

June 2013

Authors:

Krystian Prusik, Katarzyna Reclik, Danuta Stróż, Tomasz Goryczka, Józef Lelątko, Wojciech Gurdziel

Keywords:

EBSD, Ferromagnetic Shape Memory Alloys (FSMAs), Hot Extrusion, Ni-Mn-Co-in, Ni-Mn-Ga, TEM, Texture

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