. "The main aim of this project was to find the relationship between fracture mechanics, morphology of the fracture surface and nature of segregated impurities at grain boundaries. From a chosen Fe-2%V-0.12%P alloy, both polycrystalline samples with the mea"@en . . "1"^^ . . "1"^^ . "2008-12-16+01:00"^^ . . " grain boundaries" . "Hlavn\u00EDm mottem projektu bylo hled\u00E1n\u00ED vztahu mezi lomovou mechanikou, morfologi\u00ED lomov\u00E9 plochy a povahou segregovan\u00FDch ne\u010Distot na hranic\u00EDch zrn. Z vybran\u00E9 slitiny Fe-2%V-0,12%P byly p\u0159ipraveny polykrystaly se st\u0159edn\u00ED velikost\u00ED zrna 0,2 mm a bikrystaly se"@cs . "GA106/05/0134" . . "fracture mechanics; grain boundaries; solute segregation"@en . "2005-01-01+01:00"^^ . "Although the mechanics of intergranular fracture has\u00A0been studied in\u00A0a wide spectrum of materials, one aspect of this process remains still open - its a direct quantitative link of the fracture toughness to the chemical composition of grain boundaries. In addition, different segregants change bond strengths at the grain boundaries and interfacial energy, and thus the morphology of grain boundaries also changes. Therefore, the main aim of this project is the understanding and quantitative determination of the relationship between the\u00A0fracture toughness along grain boundaries, the chemical composition of these interfaces and the morphology of the fracture surfaces. In the frame of this project,\u00A0a\u00A0combined experimental and theoretical investigation of fracture processes will be performed on both polycrystals and bicrystals of the same chemical composition\u00A0in Fe-based alloys with altered solutes and impurities. The project will bring a new quality in this kind of investigation. The results will be"@en . . . "fracture mechanics" . . "11"^^ . . "Role of grain boundary morphology and chemistry in intergranular fracture"@en . "2007-05-02+02:00"^^ . . "11"^^ . . . . "Interkrystalick\u00FD lomov\u00FD mechanismus byl studov\u00E1n na \u0159ad\u011B materi\u00E1l\u016F, av\u0161ak jeden ze z\u00E1kladn\u00EDch aspekt\u016F tohoto procesu st\u00E1le z\u016Fst\u00E1v\u00E1 otev\u0159en\u00FD -\u00A0p\u0159\u00EDm\u00FD kvantitativn\u00ED vztah lomov\u00E9 hou\u017Eevnatosti k chemick\u00E9mu slo\u017Een\u00ED hranic zrn. Segreguj\u00EDc\u00ED prvky nav\u00EDc m\u011Bn\u00ED vazebn\u00E9 s\u00EDly na hranic\u00EDch zrn a jejich energii a t\u00EDm i morfologii rozhran\u00ED. Hlavn\u00EDm c\u00EDlem tohoto projektu je tedy pochopen\u00ED a kvantifikace vztahu mezi k\u0159ehk\u00FDm interkrystalick\u00FDm lomem, chemick\u00FDm slo\u017Een\u00EDm a morfologi\u00ED hranic zrn. V jeho r\u00E1mci provedeme komplexn\u00ED teoretick\u00E9 a experiment\u00E1ln\u00ED vy\u0161et\u0159ov\u00E1n\u00ED interkrystalick\u00FDch lomov\u00FDch proces\u016F na polykrystalech a bikrystalech stejn\u00E9ho chemick\u00E9ho slo\u017Een\u00ED z vybran\u00FDch modelov\u00FDch slitin na b\u00E1zi Fe s m\u011Bn\u00EDc\u00EDmi se p\u0159\u00EDm\u011Bsemi i ne\u010Distotami. Projekt tak p\u0159inese novou kvalitu studia do tohoto typu problematiky. V\u00FDsledky budou u\u017Eite\u010Dn\u00E9 pro v\u00FDrobu nov\u00FDch technologick\u00FDch materi\u00E1l\u016F na b\u00E1zi Fe a aplikovateln\u00E9 i na mnoh\u00E9 perspektivn\u00ED materi\u00E1ly jako jsou vysokotaj\u00EDc\u00ED kovy \u010Di intermetalika v\u010Detn\u011B nanokrystalick\u00FDch struktur." . "http://www.isvav.cz/projectDetail.do?rowId=GA106/05/0134"^^ . . . . "\u00DAloha morfologie a chemie hranic zrn p\u0159i interkrystalick\u00E9m lomu" . . . "0"^^ . "2007-12-31+01:00"^^ . .