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Twinning processes in Cu-Al-Ni martensite single crystals investigated by neutron single crystal diffraction method
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SYSNO ASEP 0312558 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Twinning processes in Cu-Al-Ni martensite single crystals investigated by neutron single crystal diffraction method Author(s) Molnar, P. (CZ)
Šittner, P. (CZ)
Novák, V. (CZ)
Lukáš, Petr (UJF-V) RID, ORCID, SAISource Title Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. - : Elsevier - ISSN 0921-5093
Roč. 481, Sp.Iss.SI (2008), s. 513-517Number of pages 5 s. Language eng - English Country CH - Switzerland Keywords Cu-Al-Ni ; single crystals ; neutron diffraction Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders R&D Projects IAA100480704 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z10480505 - UJF-V (2005-2011) UT WOS 000255716100106 DOI 10.1016/j.msea.2007.01.189 Annotation A neutron single crystal diffraction method for inspecting the quality of martensite single crystals is introduced. True interface-free martensite single crystals are indispensable for, e.g. measurement of elastic constants of phases by ultrasonic techniques. The neutron diffraction method was used to detect and distinguish the presence of individual lattice correspondence variants of the 2H orthorhombic martensite phase in Cu-Al-Ni as well as to follow the activity of twinning processes during the deformation test on the martensite variant single crystals. When preparing the martensite single variant prism-shaped crystals by compression deformation method, typically a small fraction of second unwanted martensitic variant (compound twin) remains in the prism samples. Due to the very low stress (similar to 1 MPa) for the compound twinning in many shape memory alloys, it is quite difficult not only to deplete the martensite prisms of all internal interfaces but mainly to keep them in the martensite single variant state for a long time needed for further investigations. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2013
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