Temperature and microstructure dependent tensile behavior of coarse grained superelastic NiTi

0570387 - FZÚ 2024 RIV GB eng J - Článek v odborném periodiku
Alarcón Tarquino, Eduardo - Heller, Luděk - de Prado, Esther - Kopeček, Jaromír
Temperature and microstructure dependent tensile behavior of coarse grained superelastic NiTi.
Materials and Design. Roč. 226, Feb (2023), č. článku 111617. ISSN 0264-1275. E-ISSN 1873-4197
Grant CEP: GA ČR(CZ) GA22-15763S; GA ČR(CZ) GA22-20181S; GA MŠMT(CZ) EF16_019/0000760
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Výzkumná infrastruktura: CzechNanoLab - 90110; CzechNanoLab II - 90251
Institucionální podpora: RVO:68378271
Klíčová slova: martensitic transformation * shape memory alloys * superelasticity * deformation twinning * NiTi * microstructure * deformation infrared calorimetry
Obor OECD: Materials engineering
Impakt faktor: 8.4, rok: 2022
Způsob publikování: Open access

In this work, effects of temperature and microstructure on tensile behavior of superelastic NiTi wires were analyzed. We analyzed cold-drawn NiTi wires of 1.78 mm that received four different final heat treatments using short direct electrical current pulses. Final coarse-grained microstructures ranged from recovered up to fully recrystallized microstructure with grain size of 25 µm. Effects of temperature in the range 30–130 °C were analyzed using monotonous tensile tests where a temperature gradient was induced along the sample axis. Deformation processes related to martensitic transformation and plastic deformation were characterized by temperature resolved stress–strain responses, deformation work, released heat, volume fraction of martensite. Deformation-induced microstructure changes were analyzed post-mortem using Electron Backscatter Diffraction and x-ray diffraction.
Trvalý link: https://hdl.handle.net/11104/0341702