TY  - SER
AU  - Reul,A.
AU  - Lauhoff,Christian
AU  - Krooß,Philipp
AU  - Somsen,Christoph
AU  - Langenkämper,Dennis
AU  - Gutmann,Matthias J.
AU  - Pedersen,B.
AU  - Hofmann,M.
AU  - Gan,W.M.
AU  - Kireeva,Irina V.
AU  - Chumlyakov,Yuri I.
AU  - Eggeler,Gunther
AU  - Niendorf,Thomas
AU  - Schmahl,Wolfgang W.
TI  - On the impact of nanometric γ’ precipitates on the tensile deformation of superelastic Co49Ni21Ga30
KW  - мартенситное превращение
KW  - микроструктура
KW  - дифракция нейтронов
KW  - монокристаллы
KW  - сверхупругость
KW  - статьи в журналах
N1  - Библиогр.: 54 назв
N2  - Results are presented reporting on the martensite domain variant selection and stress-induced martensite morphology in [001]-oriented superelastic Co49Ni21Ga30 shape memory alloy (SMA) single crystals under tensile load. In situ neutron diffraction, as well as in situ optical- and confocal laser scanning microscopy were conducted focusing on three differently treated samples, i.e. in the as-grown, solution-annealed and aged condition. An aging treatment performed at 350 °C promotes the precipitation of nanoprecipitates. These second phase precipitates contribute to an increase of the number of habit plane interfaces, while reducing lamellar martensite plate thickness compared to the as-grown and solution-annealed (precipitate free) samples. During tensile loading, all samples show a stress-induced formation of martensite, characterized by one single domain variant (“detwinned”) and one set of parallel habit planes in a shear band. The results clearly show that γ’ nanoprecipitates do not necessarily promote multi-variant interaction during tensile loading. Thus, reduced recoverability in Co-Ni-Ga SMAs upon aging cannot be solely attributed to this kind of interaction as has been proposed in literature so far
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000997188
ER  -