. . . "8"^^ . "0"^^ . "3391"^^ . . . "3391"^^ . "1"^^ . . "Martenzitick\u00E9 transformace ve slitin\u00E1ch NiTi"@cs . "1) Vysv\u011Btlit vztah mezi parametry atmosf\u00E9ry tepeln\u00E9ho zpracov\u00E1n\u00ED, stavem hranic zrn a drahou martenzitick\u00E9 transformace. 2) Nal\u00E9zt mikrostrukturn\u00ED p\u0159\u00ED\u010Diny zm\u011Bn \u00FAnavov\u00FDch charakteristik v pr\u016Fb\u011Bhu cyklov\u00E1n\u00ED. 3) P\u0159ipravit slitiny NiTi s n\u00EDzkou kontaminac\u00ED C a O vakuov\u00FDm taven\u00EDm v keramick\u00E9m kel\u00EDmku."@cs . "1"^^ . "Martensitic transformations in NiTi alloys"@en . "2009-01-01+01:00"^^ . . . . . . "martenzitick\u00E1 transformace, superelasticita, mikrostruktura, vakuov\u00E9 induk\u010Dn\u00ED taven\u00ED"@en . . "2011-12-31+01:00"^^ . "The application addresses two opened questions on the relation between microstructure and martensitic transformations in NiTi shape memory alloys: (i) how the transformation path depends on chemistry and structure of grain boundaries in polycrystals, in which boundaries can be affected by processing atmospheres during heat treatments and (ii) what is the microstructural reason for pronounced changes of hysteresis loops during functional fatigue of superelastic NiTi wires. The application also focuses on one metallurgical issue which is the vacuum melting of NiTi alloys in refractory crucibles. Here the effort aims at an alloy with low oxygen content and no additional carbon contamination. Were the project granted, we may expect the following results: (i) a new insight into the relation between processing atmospheres, state of grain boundaries and the subsequent path of martensitic transformation, (ii) a microstructurally based account for changes in the fatigue behaviour of superelastic wires and (iii) set of parameters that would optimize the vacuum melting in refractory crucibles."@en . "8"^^ .