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In situ investigation of the fast microstructure evolutionduring electropulse treatment of cold drawn NiTi wires
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SYSNO ASEP 0358978 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název In situ investigation of the fast microstructure evolutionduring electropulse treatment of cold drawn NiTi wires Tvůrce(i) Malard, B. (FR)
Pilch, Jan (FZU-D) RID
Šittner, Petr (FZU-D) RID, ORCID
Delville, R. (BE)
Curfs, C. (FR)Zdroj.dok. Acta Materialia. - : Elsevier - ISSN 1359-6454
Roč. 59, č. 4 (2011), s. 1542-1556Poč.str. 15 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova shape memory alloys ; recovery ; recrystallization ; Joule heating ; superelasticity Vědní obor RIV BM - Fyzika pevných látek a magnetismus CEP GAP108/10/1296 GA ČR - Grantová agentura ČR IAA200100627 GA AV ČR - Akademie věd GAP107/10/0824 GA ČR - Grantová agentura ČR LA10010 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy CEZ AV0Z10100520 - FZU-D (2005-2011) UT WOS 000287265100023 DOI 10.1016/j.actamat.2010.11.018 Anotace Microstructural changes taking place during the heat treatment of cold-worked NiTi alloy are of key interest in shape memory alloy technology, since they are responsible for setting the austenite shape and functional properties of the heat-treated alloy. In this work, microstructural evolution during non-conventional electropulse heat treatment of thin NiTi filaments was investigated in a unique high-speed in situ synchrotron X-ray diffraction experiment with simultaneous evaluation of the tensile force and electrical resistivity of the treated wire. The in situ results provide direct experimental evidence on the evolution of the internal stress and density of defects during fast heating from 20 C to 700 C. This evidence is used to characterize a sequence of dynamic recovery and recrystallization processes responsible for the microstructure and superelastic functional property changes during the electropulse treatments. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2012
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