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Statements

Subject Item
n2:1913
rdf:type
n3:Projekt
dcterms:description
1) Vysvětlit vztah mezi parametry atmosféry tepelného zpracování, stavem hranic zrn a drahou martenzitické transformace. 2) Nalézt mikrostrukturní příčiny změn únavových charakteristik v průběhu cyklování. 3) Připravit slitiny NiTi s nízkou kontaminací C a O vakuovým tavením v keramickém kelímku. 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.
dcterms:title
Martenzitické transformace ve slitinách NiTi Martensitic transformations in NiTi alloys
n3:cislo-smlouvy
n8:1913
n3:dalsi-vedlejsi-obor
n10:BM
n3:druh-souteze
n6:VS
n3:faze
n13:52807497
n3:hlavni-obor
n10:JG
n3:vedlejsi-obor
n10:JJ
n3:id-aktivity
n4:GA
n3:id-souteze
n11:SGA02009GA-ST
n3:kategorie
n5:1
n3:klicova-slova
martenzitická transformace, superelasticita, mikrostruktura, vakuové indukční tavení
n3:konec-reseni
2011-12-31+01:00
n3:pocet-koordinujicich-prijemcu
0
n3:poskytovatel
n7:GA0
n3:start-reseni
2009-01-01+01:00
n3:statni-podpora
3391
n3:typProjektu
n12:P
n3:uznane-naklady
3391
n3:pocet-prijemcu
1
n3:pocet-spoluprijemcu
1
n3:pocet-vysledku
8
n3:pocet-vysledku-zverejnovanych
8