. . . "RIV/00216305:26210/05:PU55324" . "\u00DAstav fyziky materi\u00E1l\u016F AV \u010CR" . "Pokud jsou precipita\u010Dn\u011B zpevn\u011Bn\u00E9 superslitiny vystaveny p\u016Fsoben\u00ED vysok\u00FDch teplot, doch\u00E1z\u00ED ke zhrubnut\u00ED a \u010D\u00E1ste\u010Dn\u00E9 sferoidizaci precipit\u00E1t\u016F gama s \u010Darou, p\u0159i\u010Dem\u017E intenzita tohoto procesu je z\u00E1visl\u00E1 na v\u00FD\u0161i teploty exploatace. Precipit\u00E1ty ve tvaru krychl\u00EDmaj\u00ED tendenci spojovat se do skupinek a vytv\u00E1\u0159et \u0159et\u00EDzkovit\u00E9 nebo blokov\u00E9 \u00FAtvary. Tento proces neprob\u00EDh\u00E1 n\u00E1hodn\u011B, ale doch\u00E1z\u00ED k usm\u011Brn\u011Bn\u00E9 koalescenci, co\u017E je zp\u016Fsobeno mimo jin\u00E9 chemickou heterogenitou, vypl\u00FDvaj\u00EDc\u00ED ze segregace v pr\u016Fb\u011Bhu tuhnut\u00ED. V m\u00EDsteech, kde jsou \u010D\u00E1stice precipit\u00E1tu gama s \u010Darou vylou\u010Den\u00E9 v paraleln\u00EDch rovin\u00E1ch, vznik\u00E1 tzv. raftov\u00E1 morfologie. Vlastn\u00ED jev, naz\u00FDvan\u00FD rafting, se vyskytuje pouze p\u0159i sou\u010Dasn\u00E9m p\u016Fsoben\u00ED vysok\u00FDch teplot a zat\u011B\u017Euj\u00EDc\u00EDho nap\u011Bt\u00ED. Mechanismus popisuj\u00EDc\u00ED lok\u00E1ln\u00ED rafting je komplexn\u00ED a zahrnuje vliv chemick\u00E9 heterogenity i vnit\u0159n\u00EDch nap\u011B\u0165ov\u00FDch pol\u00ED [1]. Orientace raft\u016F z\u00E1vis\u00ED na orientaci krystalografick\u00FDch rovin vzhledem k ose zat\u011B\u017Eov\u00E1n\u00ED a na m\u0159\u00ED\u017Ekov\u00E9 neshod\u011B mezi f\u00E1zemi gama a gama s \u010Darou."@cs . "VU\u017DIT\u00CD OBRAZOV\u00C9 ANAL\u00DDZY PRO HODNOCEN\u00CD DEGRADACE MIKROSTRUKTURY NIKLOV\u00DDCH SUPERSLITIN" . "RIV/00216305:26210/05:PU55324!RIV06-GA0-26210___" . "V\u00E1lek, Robert" . "549811" . . "[82E032670EEC]" . "VU\u017DIT\u00CD OBRAZOV\u00C9 ANAL\u00DDZY PRO HODNOCEN\u00CD DEGRADACE MIKROSTRUKTURY NIKLOV\u00DDCH SUPERSLITIN"@cs . . "Pokud jsou precipita\u010Dn\u011B zpevn\u011Bn\u00E9 superslitiny vystaveny p\u016Fsoben\u00ED vysok\u00FDch teplot, doch\u00E1z\u00ED ke zhrubnut\u00ED a \u010D\u00E1ste\u010Dn\u00E9 sferoidizaci precipit\u00E1t\u016F gama s \u010Darou, p\u0159i\u010Dem\u017E intenzita tohoto procesu je z\u00E1visl\u00E1 na v\u00FD\u0161i teploty exploatace. Precipit\u00E1ty ve tvaru krychl\u00EDmaj\u00ED tendenci spojovat se do skupinek a vytv\u00E1\u0159et \u0159et\u00EDzkovit\u00E9 nebo blokov\u00E9 \u00FAtvary. Tento proces neprob\u00EDh\u00E1 n\u00E1hodn\u011B, ale doch\u00E1z\u00ED k usm\u011Brn\u011Bn\u00E9 koalescenci, co\u017E je zp\u016Fsobeno mimo jin\u00E9 chemickou heterogenitou, vypl\u00FDvaj\u00EDc\u00ED ze segregace v pr\u016Fb\u011Bhu tuhnut\u00ED. V m\u00EDsteech, kde jsou \u010D\u00E1stice precipit\u00E1tu gama s \u010Darou vylou\u010Den\u00E9 v paraleln\u00EDch rovin\u00E1ch, vznik\u00E1 tzv. raftov\u00E1 morfologie. Vlastn\u00ED jev, naz\u00FDvan\u00FD rafting, se vyskytuje pouze p\u0159i sou\u010Dasn\u00E9m p\u016Fsoben\u00ED vysok\u00FDch teplot a zat\u011B\u017Euj\u00EDc\u00EDho nap\u011Bt\u00ED. Mechanismus popisuj\u00EDc\u00ED lok\u00E1ln\u00ED rafting je komplexn\u00ED a zahrnuje vliv chemick\u00E9 heterogenity i vnit\u0159n\u00EDch nap\u011B\u0165ov\u00FDch pol\u00ED [1]. Orientace raft\u016F z\u00E1vis\u00ED na orientaci krystalografick\u00FDch rovin vzhledem k ose zat\u011B\u017Eov\u00E1n\u00ED a na m\u0159\u00ED\u017Ekov\u00E9 neshod\u011B mezi f\u00E1zemi gama a gama s \u010Darou." . "73-78" . "Podr\u00E1bsk\u00FD, Tom\u00E1\u0161" . . "VU\u017DIT\u00CD OBRAZOV\u00C9 ANAL\u00DDZY PRO HODNOCEN\u00CD DEGRADACE MIKROSTRUKTURY NIKLOV\u00DDCH SUPERSLITIN" . "6"^^ . "N\u011Bmec, Karel" . . . . . "FSI VUT Brno" . . "80-239-6145-4" . "3"^^ . "Nickel-based superalloy hardened by a dispersion of the ?\u00C1?L phase belongs to typical precipitation hardened alloys. In the process of a creep load, particles of the secondary phase may in certain conditions effectively obstruct the movement of dislocations even in extremely high temperatures. An ideal case is demonstrated by particles that are practically inert to the matrix. In areas where particles of the ?\u00C1?L precipitate are precipitated in plane-parallel planes, the so-called raft morphology originnates. The issue of rafting is gaining in importance in case of a load in the course of heat exposure; this phenomenon is fully anisotropic and is a significant factor influencing creep properties during high temperatures. The orientation of rafts is dependent upon the orientation of grains towards the load axis and upon a lattice discrepancy between the ?\u00C1 and ?\u00C1?L phases."@en . "2005-12-01+01:00"^^ . "Use the image analyses for classification of degradation microstructure on nickel-base superalloy."@en . "3"^^ . . "Brno" . . . "V\u00EDce\u00FArov\u0148ov\u00FD design pokrokov\u00FDch materi\u00E1l\u016F 2005" . . "Image analyses, microstructure, superalloy"@en . "Use the image analyses for classification of degradation microstructure on nickel-base superalloy."@en . . . "P(GA106/02/1088)" . . "VU\u017DIT\u00CD OBRAZOV\u00C9 ANAL\u00DDZY PRO HODNOCEN\u00CD DEGRADACE MIKROSTRUKTURY NIKLOV\u00DDCH SUPERSLITIN"@cs . "26210" .