. . "5"^^ . . . . "686924" . "Dlouh\u00FD, Anton\u00EDn" . "MATERIAL STRUCTURE & MICROMECHANICS OF FRACTURE PROCEEDINGS MSMF-3." . . . . . "The present study investigates microstructure and creep behaviour of the cast alloy Ti-46A1-2W-0.5Si (at-%) at temperatures 700, 750 and 800 C and applied stresses between 250-420 MPa. Solidification of the alloy during precision casting is associated with two processes: (i) the growth of the [0001].alpha. oriented columnar grains from the mould wall into the cast interior and (ii) the enrichment of the central part of the cast with aluminium. The first process results in a fully lamellar microstructure where lamellae are preferentially oriented parallel to the cast surface. The second process contributes to the development of the duplex microstructure in the central part of the cast. It is shown that distinct microstructural types in different regions of the cast result in different creep strengths. Specimens taken from inside of the cast and oriented parallel to the cast bar axis exhibited the lowest creep strength while similarly oriented specimens cut from the fully lamellar region near t" . "80-214-1892-3" . "intermetallics; gas turbine; gamma-TiAl"@en . "2001-06-27+02:00"^^ . . "V\u00E1lek, Robert" . "Microstructure and Anisotropy of Creep in Ti-46Al-2W-0.5Si Castings."@en . "RIV/68081723:_____/01:07013241" . . "RIV/68081723:_____/01:07013241!RIV/2003/AV0/A07003/N" . "[D963BB043F48]" . . "B\u0159ezina, Josef" . . . "Vysok\u00E9 u\u010Den\u00ED technick\u00E9 v Brn\u011B. Nakladatelstv\u00ED VUTIUM" . "Svoboda, Milan" . "Brno [CZ]" . . . "P(IBS2041001), P(OC 522.100), Z(AV0Z2041904)" . "The present study investigates microstructure and creep behaviour of the cast alloy Ti-46A1-2W-0.5Si (at-%) at temperatures 700, 750 and 800 C and applied stresses between 250-420 MPa. Solidification of the alloy during precision casting is associated with two processes: (i) the growth of the [0001].alpha. oriented columnar grains from the mould wall into the cast interior and (ii) the enrichment of the central part of the cast with aluminium. The first process results in a fully lamellar microstructure where lamellae are preferentially oriented parallel to the cast surface. The second process contributes to the development of the duplex microstructure in the central part of the cast. It is shown that distinct microstructural types in different regions of the cast result in different creep strengths. Specimens taken from inside of the cast and oriented parallel to the cast bar axis exhibited the lowest creep strength while similarly oriented specimens cut from the fully lamellar region near t"@en . "Microstructure and Anisotropy of Creep in Ti-46Al-2W-0.5Si Castings." . "8"^^ . . . . "Brno" . "0"^^ . "Microstructure and Anisotropy of Creep in Ti-46Al-2W-0.5Si Castings."@en . "Kucha\u0159ov\u00E1, Kv\u011Bta" . "X1-X5" . "0"^^ . . . "5"^^ . "Microstructure and Anisotropy of Creep in Ti-46Al-2W-0.5Si Castings." . . .