Fatigue of superelastic NiTi wires with different plateau strain

0469772 - FZÚ 2017 RIV NL eng K - Konferenční příspěvek (tuzemská konf.)
Tyc, O. - Pilch, Jan - Šittner, Petr
Fatigue of superelastic NiTi wires with different plateau strain.
21st European Conference on Fracture. Amsterdam: Elsevier, 2016, s. 1489-1496. Procedia Structural Integrity, 2. ISSN 2452-3216.
[ECF21 - European Conference on Fracture /21./. Catania (IT), 20.06.2016-24.06.2016]
Grant CEP: GA ČR GA16-20264S
Institucionální podpora: RVO:68378271
Klíčová slova: NiTi alloy * heat treatment * martensitic transformation * superelasticity * fatigue
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
www.sciencedirect.com/science/article/pii/S2452321616301998

Microstructures and thermomechanical responses of Ni-rich superelastic wires can be tuned in relatively large extent by varying the degree of cold work and heat treatment. What frequently remains unknown is the superelastic fatigue performance of the wires – whether and/or how it depends on the heat treatment. In this study, five superelastic NiTi wires (d=0.051mm) having similar transformation stresses but different microstructures and transformation strains (3.1, 3.9, 4.7, 5.6, 6.7 %) were produced from one spool of a hot worked NiTi wire by applying different cold work/heat treatments to investigate the influence of the wire microstructure (transformation strain) on its structural and functional fatigue performance. The wires were cycled in tension beyond the end of superelastic plateau at constant temperature in strain rate controlled mode until failure

Trvalý link: http://hdl.handle.net/11104/0267561