Počet záznamů: 1  

Twinning processes in Cu-Al-Ni martensite single crystals investigated by neutron single crystal diffraction method

  1. 1. 0312558 - UJF-V 2013 RIV CH eng J - Článek v odborném periodiku
    Molnar, P. - Šittner, P. - Novák, V. - Lukáš, Petr
    Twinning processes in Cu-Al-Ni martensite single crystals investigated by neutron single crystal diffraction method.
    Materials Science and Engineering A-Structural materials. Roč. 481, Sp.Iss.SI (2008), s. 513-517. ISSN 0921-5093
    Grant CEP: GA AV ČR IAA100480704
    Výzkumný záměr: CEZ:AV0Z10480505
    Klíčová slova: Cu-Al-Ni * single crystals * neutron diffraction
    Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
    Impakt faktor: 1.806, rok: 2008

    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.
    Trvalý link: http://hdl.handle.net/11104/0163589