TEM analysis of deformation bands created by tensile deformation of superelastic NiTi wires

0532824 - FZÚ 2021 RIV US eng J - Journal Article
Molnárová, Orsolya - Šittner, Petr - Veselý, J. - Cieslar, M.
TEM analysis of deformation bands created by tensile deformation of superelastic NiTi wires.
Materials Characterization. Roč. 167, Sep (2020), s. 1-10, č. článku 110470. ISSN 1044-5803. E-ISSN 1873-4189
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR GA18-03834S; GA MŠMT LM2018110
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : shape memory alloy * martensitic phase transformation * NiTi * transmission electron microscopy * selected area electron diffraction * dark field imaging
OECD category: Materials engineering
Impact factor: 4.342, year: 2020
Method of publishing: Limited access
https://doi.org/10.1016/j.matchar.2020.110470

Deformation processes derived from martensitic transformation in shape memory alloys are theoretically fully recoverable in a complete thermomechanical loading cycle across transformation range and do not leave any lattice defects in the microstructure. In reality, this is rarely the case in NiTi, since plastic deformation tends to accompany the martensitic transformation, particularly if it proceeds under large stress. Lattice defects observed in the microstructure of deformed NiTi wires (slip dislocations and deformation bands) attract the attention of researchers, since they are linked to unrecovered strains and play significant role in functional fatigue, shape setting or two-way shape memory effect. In this work, we present an experimental approach allowing for analysis of deformation bands in deformed NiTi
Permanent Link: http://hdl.handle.net/11104/0311215