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Twin boundaries in trained 10M Ni-Mn-Ga single crystals

Zwillingsgrenzen in trainierten 10M Ni-Mn-Ga Einkristallen
: Chulist, Robert; Pagounis, Emmanouel; Böhm, Andrea; Oertel, Carl-Georg; Skrotzki, Werner


Scripta materialia 67 (2012), No.4, pp.364-367
ISSN: 1359-6462
Journal Article
Fraunhofer IWU ()
Ni-Mn-Ga; EBSD; twinning; modulation

The arrangement of twin boundaries in trained 10M Ni-Mn-Ga single crystals was investigated by electron backscatter diffraction (EBSD) in a scanning electron microscope. Precise monoclinic structure data including direction of modulation were used to determine all possible boundaries. Besides type I, II and compound twins typical for monoclinic symmetry, a boundary between two directions of modulation was also detected. Compared to EBSD analysis done with simple tetragonal structure for 10 M Ni-Mn-Ga alloys, a more complex microstructure with new boundaries is revealed.