Název:
Microstructure Characterization and Faigue Behavior of Beta Phase Containing Gama-TiAl Alloy
Autoři:
Petrenec, Martin ; Beran, Přemysl ; Šmíd, Miroslav ; Chlupová, Alice ; Kuběnová, Monika Typ dokumentu: Příspěvky z konference Konference/Akce: Metal 2012, Brno (CZ), 2012-05-23 / 2012-05-25
Rok:
2012
Jazyk:
eng
Abstrakt: The microstructure and fatigue properties of Ti–44Al–7.8Nb – 0.2Ni (at.%) alloy after graded cooling heat treatment were investigated. Different techniques as SEM, TEM and FIB were used for characterization of microstructure. Quantification of phase volume fraction was measured by neutron diffraction method. After graded cooling heat treatment the structure consists of fully lamellar uniform grains which contain lamellar phases /2 and cubic phases (ordered B2 and disordered phases) at grain boundary and interlamellar spaces. The foils for TEM were prepared using FIB technique and observed in TEM in order to identify B2 phase by selected electron diffraction. Low cycle fatigue behaviour at 750 °C shows stable fatigue crack propagation due the presence of plastic beta and B2 phases.
Klíčová slova:
cast gama-TiAl alloy; fatigue; graded cooling heat treatment; microstructure; neutron diffraction Číslo projektu: CEZ:AV0Z2041904 (CEP), CEZ:AV0Z10480505 (CEP), GAP107/11/0704 (CEP) Poskytovatel projektu: GA ČR Zdrojový dokument: METAL 2012 Conference Proceedings, ISBN 978-80-87294-31-4
Instituce: Ústav fyziky materiálů AV ČR
(web)
Informace o dostupnosti dokumentu:
Dokument je dostupný v příslušném ústavu Akademie věd ČR. Původní záznam: http://hdl.handle.net/11104/0215265