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Texture evolution of HPT-processed Ni 50Mn 29Ga 21

Texturbildung von HPT-hergestelltem Ni50Mn29Ga21
: Chulist, Robert; Böhm, Andrea; Rybacki, E.; Lippmann, T.; Oertel, C.-G.; Skrotzki, Werner


Tewari, A.:
Textures of materials. Part 1 : Selected, peer reviewed papers from the 16th International Conference on Textures of Materials (ICOTOM 16), 12 - 17 December, 2011, Mumbai, India
Dürnten: Trans Tech Publications, 2012 (Materials Science Forum 702-703)
ISBN: 978-3-03-785294-1
International Conference on Textures of Materials (ICOTOM) <16, 2011, Bombay>
Fraunhofer IWU ()
NiMnGa; torsion; synchrotron radiation; microstructure; texture

The texture of polycrystalline Ni 50Mn 29Ga 21 alloys fabricated by high pressure torsion (HPT) was investigated with high-energy synchrotron radiation. HPT was performed at temperatures between 873K and 1173K under a hydrostatic pressure of 400 MPa. During HPT above 973K the initial cyclic fibre texture changes to a strong cube and a weak F component. Below 973K a strong rotated cube and weak F and C components develop. Additionally, electron backscatter diffraction reveals that samples deformed at low temperature do not completely transform to martensite giving rise to residual austenite.