0399156 - FZÚ 2014 US eng C - Conference Paper (international conference)
Ge, Y. - Zárubová, Niva - Heczko, Oleg - Hannula, S.-P.
In-situ TEM strainning of hierarchically twinned non-modulated martensite in Ni-Mn-Ga.
ICFSMA 2013. 3rd International Conference on Ferromagnetic Shape Memory Alloys. Boise, Idaho: Boise, 2013, s. 92-93.
[International Conference on Ferromagnetic Shape Memory Alloys /4./ - ICFSMA 2013. Boise, Idaho (US), 03.06.2013-07.06.2013]
R&D Projects: GA ČR(CZ) GAP107/11/0391; GA ČR GAP107/12/0800
Institutional support: RVO:68378271
Keywords : Ni-Mn-Ga * in-situ TEM * magnetic shape memory * deformation twinning * twinning dislocation
Subject RIV: BM - Solid Matter Physics ; Magnetism

Twinning/detwinning processes were followed on non-modulated (NM) Ni-Mn-Ga martensite by in-situ TEM straining experiments. The processes were detected on the two levels of hierarchically twinned structure. First, one of paired internal twins vanish, and then new twins form in the detwinned areas.Both stages involve movement of twinning dislocations. Boundaries between internally twinned domains are incoherent and immobile. lnterfaces between the internal twins are coherent and their gradual forward movement under stress is caused by the twinning dislocations.
Permanent Link: http://hdl.handle.net/11104/0226507