In-situ neutron diffraction investigations of the stress induced martensitic transformations in NiTi

0185574 - UJF-V 20020084 FR eng C - Konferenční příspěvek (zahraniční konf.)
Šittner, Petr - Novák, Václav - Lukáš, Petr - Neov, Dimitar
In-situ neutron diffraction investigations of the stress induced martensitic transformations in NiTi.
New Trends in Phase Transformations and their Applications to Smart Structures. Metz: Kluwer Academic Publishers, 2002, s. -.
[NATO ARW Conference. Metz (FR), 23.04.2002-26.04.2002]
Grant CEP: GA AV ČR IAA1048107; GA ČR GV202/97/K038
Klíčová slova: neutron diffraction * martensitic transforamation
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

Martensitic transformations in Ni-49.5Ti (at.%) polycrystals transforming upon mechanical loading in tension and compression were investigated by in-situ neutron diffraction experiments. Transformation processes, in particular, the stresses and phase fractions evolving in specifically oriented grains of the transforming polycrystal were evaluated and the results were interpreted using a dedicated micromechanisc model. The experimentally observed tension/compression asymmetry of mechanical properties, stress induced martensite textures and load and phase fraction partitioning in the transforming NiTi polycrystal were linked by the model to the crystallography of B2-B19` transformation.
Trvalý link: http://hdl.handle.net/11104/0081964