Mechanism of twinning/detwinning processes in NiMnGa

0372630 - FZÚ 2012 DE eng C - Konferenční příspěvek (zahraniční konf.)
Zárubová, Niva - Ge, Y. - Gemperlová, Juliana - Gemperle, Antonín - Hannula, S.-P.
Mechanism of twinning/detwinning processes in NiMnGa.
ICFSMA 2011. 3rd International Conference on Ferromagnetic Shape Memory Alloys. Dresden: IFW Dresden, 2011, s. 89-90. ISBN N.
[International Conference on Ferromagnetic Shape Memory Alloys /3./ - ICFSMA 2011. Dresden (DE), 18.07.2011-22.07.2011]
Grant CEP: GA ČR(CZ) GAP107/11/0391; GA AV ČR IAA100100920; GA AV ČR(CZ) IAA200100627
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: Ni-Mn-Ga shape memory alloy * martensitic transformation * in-situ TEM straining
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

Mechanism of twinning in NiMnGa has been investigated by in-situ straining in a transmission electron microscope (TEM). Detwinning processes are observed during the tensile tests of samples of self-accommodated tetragonal martensite. The more favorable martensite variants replace the less favorable ones. The process occurs via movement of twinning dislocations that nucleate in the boundaries between individual twinned regions. The dislocations glide along {101} planes, their Burgers vector is of [101] type.
Trvalý link: http://hdl.handle.net/11104/0205896