"NiTi Shape Memory Alloys and Their Processing-Structure-Transformation Behaviour Relationship"@en . . "Nitinol; shape memory effect; martenzitic transformation; precipitation of Ni4Ti3; TEM"@en . "2008-12-16+01:00"^^ . . . . . . . "Vztah mezi p\u0159\u00EDpravou, strukturou a transforma\u010Dn\u00EDm chov\u00E1n\u00EDm tvarov\u011B pam\u011B\u0165ov\u00FDch slitin NiTi" . "Projekt, jeho\u017E n\u00E1vrh je p\u0159edkl\u00E1d\u00E1n k posouzen\u00ED, si klade dva hlavn\u00ED c\u00EDle: (i) objasnit souvislost mezi stavem precipitace f\u00E1ze Ni4Ti3 v t\u00E9m\u011B\u0159 stechiometrick\u00FDch tvarov\u011B pam\u011B\u0165ov\u00FDch slitin\u00E1ch NiTi a chov\u00E1n\u00EDm t\u011Bchto slitin p\u0159i dop\u0159edn\u00E9 a zp\u011Btn\u00E9 martenzitick\u00E9transformaci B2-(R)-B19' a (ii) vytvo\u0159it v\u011Bdomostn\u00ED z\u00E1kladnu a technologick\u00E9 podm\u00EDnky nutn\u00E9 k tomu, aby bylo mo\u017En\u00E9 p\u0159en\u00E9st perspektivn\u00ED postupy taven\u00ED a lit\u00ED NiTi slitin do pr\u016Fmyslov\u00E9ho prost\u0159ed\u00ED \u010CR. V\u00FDznamn\u00FDm sjednocuj\u00EDc\u00EDm prvkem obou \u010D\u00E1st\u00ED projektu je posouzen\u00ED vlivu p\u0159\u00EDm\u011Bs\u00ED kontaminuj\u00EDc\u00EDch slitiny NiTi p\u0159i jejich p\u0159\u00EDprav\u011B na tvorbu mikrostruktury a n\u00E1sledn\u00FD pr\u016Fb\u011Bh martenzitick\u00E9 transformace. Na z\u00E1klad\u011B \u0159e\u0161en\u00ED lze o\u010Dek\u00E1vat n\u00E1sleduj\u00EDc\u00ED st\u011B\u017Eejn\u00ED v\u00FDsledky: (i) systematick\u00E1 data vymezuj\u00EDc\u00ED typ a parametryNi4Ti3 precipitace v niklem bohat\u00FDch verz\u00EDch NiTi slitin v z\u00E1vislosti na velikosti jednoos\u00E9ho aplikovan\u00E9ho nap\u011Bt\u00ED, na teplot\u011B a na dob\u011B st\u00E1rnut\u00ED, (ii) kvantitativn\u00ED a krystalografick\u00E9 relace mezi velikost\u00ED a orientac\u00ED Ni4Ti3 precipit\u00E1t\u016F a velikost\u00ED a" . "http://www.isvav.cz/projectDetail.do?rowId=GA106/05/0918"^^ . . "2005-01-01+01:00"^^ . " precipitation of Ni4Ti3" . "GA106/05/0918" . . "2007-05-02+02:00"^^ . " martenzitic transformation" . . " shape memory effect" . "Bylo studov\u00E1no 7 r\u016Fzn\u00FDch niklem bohat\u00FDch slitin NiTi s tvarovou pam\u011Bt\u00ED. Systematick\u00FDmi zm\u011Bnami slo\u017Een\u00ED, teploty, doby, aplikovan\u00E9ho nap\u011Bt\u00ED a ochrann\u00E9 atmosf\u00E9ry p\u0159i tepeln\u011B-mechanick\u00E9m zpracov\u00E1n\u00ED se poda\u0159ilo p\u0159ipravit \u0161irokou \u0161k\u00E1lu typ\u016F precipitace Ni4Ti3"@cs . . "11"^^ . "11"^^ . . . . "1"^^ . "There are two primary objectives of the research proposed in this application: (i) to find a link between the parameters of the Ni4Ti3 phase precipitation and the characteristics of forward and reverse martensitic transformations B2-(R)-B19' in Ni-rich NiTi shape memory alloys (SMAs) and (ii) to demonstrate that the processing technology of advanced materials (in particular melting and casting of NiTi SMAs) can be successfully transferred to and grown in the traditional industrial environment of the Czech Republic. The study of impurities (introduced during the alloy processing) and their influence on the microstructure and NiTi shape memory characteristics establishes a close link between the two main objectives of the proposed investigation. We expect that four fundamental achievements will result from the project: (i) a set of conditions in terms of the magnitude of externally applied stress, aging temperature and aging time which yield a specific type of Ni4Ti3 precipitation, (ii)"@en . . "Seven different Ni-rich NiTi shape memory alloys have been investigated. The alloy composition, temperature, time, applied stress and protection atmosphere during heat treatments were systematically varied in order to promote a range of Ni4Ti3 precipitat"@en . "1"^^ . . . "Nitinol" . . . "0"^^ . "2007-12-31+01:00"^^ . .