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On the coupling between martensitic transformation and plasticity in NiTi: Experiments and continuum based modelling
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SYSNO ASEP 0494708 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title On the coupling between martensitic transformation and plasticity in NiTi: Experiments and continuum based modelling Author(s) Šittner, P. (CZ)
Sedlák, Petr (UT-L) RID, ORCID
Seiner, Hanuš (UT-L) RID, ORCID
Sedmák, P. (CZ)
Pilch, J. (CZ)
Delville, R. (BE)
Heller, L. (CZ)
Kadeřávek, L. (CZ)Number of authors 8 Source Title Progress in Materials Science. - : Elsevier - ISSN 0079-6425
Roč. 98, č. 10 (2018), s. 249-298Number of pages 50 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords shape memory alloy ; martensitic transformation ; plasticity ; thermomechanical loading ; mechanics modelling ; X-ray diffraction Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects GB14-36566G GA ČR - Czech Science Foundation (CSF) Institutional support UT-L - RVO:61388998 UT WOS 000445714000005 EID SCOPUS 85049882428 DOI 10.1016/j.pmatsci.2018.07.003 Annotation Recent macroscopic experimental and theoretical evidence on the stress-strain-temperature behavior of NiTi beyond the strain recoverability limits (large strain, high stress, high temperature), where reversible martensitic transformation tends to proceed together with irreversible plastic deformation processes, is reviewed. Model predictions on the transformation – plasticity coupling are laid out based on the mathematical theory of martensitic microstructures and the crystal plasticity theory. A particular attention is paid to the strain compatibility at moving phase interfaces that may have a direct impact on the plasticity accompanying the martensitic transformation. It is suggested that strong transformation-plasticity coupling shall be expected during the reverse martensitic transformation. Macroscopic models from the literature capable of simulation of thermomechanical responses of NiTi polycrystals due to coexisting martensitic transformation and plastic deformation are reviewed. Dedicated thermomechanical loading experiments on superelastic and actuator NiTi wires aimed at improving our understanding of the coupling between martensitic transformation and plasticity are presented. Based on the results of in-situ studies during thermomechanical loading experiments (electric resistance, synchrotron X-ray diffraction, surface strain by DIC, relaxations) and characterization microstructures in deformed wires by TEM, it is shown that: (i) microstructures and consequently functional properties of annealed NiTi wires can be purposely manipulated by thermomechanical processing, (ii) shape setting of NiTi can be performed at relatively low temperatures (<300 °C), (iii) strain drift of NiTi actuators can be brought under control utilizing the knowledge derived from the presented experiments. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2019
Number of the records: 1