"16"^^ . "2011-03-18+01:00"^^ . "16"^^ . . "structure stability" . . . "2011-12-31+01:00"^^ . "2008-01-01+01:00"^^ . "http://www.isvav.cz/projectDetail.do?rowId=IAA101120803"^^ . "The objective of the project was the investigation of machanical properties, microstructure evolution and structure stability of UFG materials of different crystal structure prepared by ECAP and HPT. All planned work was conducted and well presented."@en . "C\u00EDlem projektu bylo komplexn\u00ED studium mechanick\u00FDch vlastnost\u00ED, v\u00FDvoje mikrostruktury a strukturn\u00ED stability ultrajemnozn\u00FDch polykrystal\u016F s r\u016Fznou krystalickou m\u0159\u00ED\u017Ekou p\u0159ipraven\u00FDch metodami ECAP a HPT. V\u0161echny pl\u00E1novan\u00E9 c\u00EDle byly spln\u011Bny a prezentov\u00E1ny."@cs . . . . . . "IAA101120803" . "Structure stability of fine-grained materials prepared by severe plastic deformation"@en . . "Strong grain refinement may result in strong increase in strength. If the small grain size (below 1 micrometer) is retained to elevated temperatures there is a potential for achieving good formability and high ductility. Several processing techniques are used for the refinement of the microstructure. One of the most promising is the equal channel angular pressing (ECAP) in which multipass pressing of the specimen allows to reach very high total strains (of 6-8) and high grain refinement in the material. ECAP processed metals and alloys have proven to be a promising class of novel materials with a wide variety of possible applications. The objective of this project is to prepare ultra-fine grained materials of various crystallographic structures and to critically evaluate their thermal and structural stability and to study the micromechanisms which control the microstructure development. CuZr alloy, low carbon steel and commercial magnesium alloys were selected for this investigation."@en . . . . . "structure stability; severe plastic deformation; microstructure development; fine-grained materials"@en . . "1"^^ . . "Stukturn\u00ED stabilita jemnozrnn\u00FDch materi\u00E1l\u016F p\u0159ipraven\u00FDch intenzivn\u00ED plastickou deformac\u00ED" . . " severe plastic deformation" . "V\u00FDrazn\u00E9 zmen\u0161en\u00ED velikosti zrna vede k v\u00FDznamn\u00E9mu vzr\u016Fstu pevnosti materi\u00E1lu. Pokud se mal\u00E9 zrno (men\u0161\u00ED ne\u017E 1 mikrometr) udr\u017E\u00ED i za zv\u00FD\u0161en\u00FDch teplot, m\u00E1 materi\u00E1l obvykle dobrou tv\u00E1rnost a vysokou ta\u017Enost. Zjemn\u011Bn\u00ED mikrostruktury lze dos\u00E1hnout n\u011Bkolika metodami. Jednou z nejslibn\u011Bj\u0161\u00EDch a v posledn\u00ED dob\u011B \u010Dasto pou\u017E\u00EDvan\u00FDch metod je tzv. metoda ECAP, p\u0159i kter\u00E9 lze opakovan\u00FDm protla\u010Dov\u00E1n\u00EDm vzorku dv\u011Bma na sebe kolm\u00FDmi kan\u00E1ly t\u00E9ho\u017E p\u0159\u00ED\u010Dn\u00E9ho pr\u016F\u0159ezu dos\u00E1hnout vysok\u00FDch skute\u010Dn\u00FDch deformac\u00ED (6-8), kter\u00E9 vedou k podstatn\u00E9mu zjemn\u011Bn\u00ED zrna. Kovy a slitiny p\u0159ipraven\u00E9 metodou ECAP p\u0159edstavuj\u00ED nov\u00E9 materi\u00E1ly s celou \u0159adou mo\u017En\u00FDch slibn\u00FDch strukturn\u00EDch aplikac\u00ED. C\u00EDlem tohoto projektu je p\u0159ipravit metodou ECAP materi\u00E1ly s r\u016Fznou krystalografickou strukturou s velmi jemn\u00FDm zrnem, posoudit jejich teplotn\u00ED a strukturn\u00ED stabilitu a studovat mikroskopick\u00E9 mechanismy odpov\u011Bdn\u00E9 za v\u00FDvoj mikrostruktury. Pro studium byla vybr\u00E1na slitina CuZr, n\u00EDzkolegovan\u00E1 ocel a komer\u010Dn\u00ED hor\u010D\u00EDkov\u00E9 slitiny." . . "0"^^ . "0"^^ . . "2013-06-28+02:00"^^ . " microstructure development" .