Název: The Influence of Carbon on Small Punch Testing of Niobium-alloyed Iron Aluminide
Autoři: Dobeš, Ferdinand ; Dymáček, Petr
Typ dokumentu: Příspěvky z konference
Konference/Akce: Determination of Mechanical Properties of Materials by Small Punch and Other Miniature Techniques, Ostrava (CZ), 2012-10-02 / 2012-10-04
Rok: 2012
Jazyk: eng
Abstrakt: Iron-aluminium-based alloys are promising candidates for various applications at high temperatures. Unfortunately, creep resistance of these alloys is relatively low. It could be improved by introducing second-phase particles, e. g., by additions of carbon and carbide forming elements. On the other hand, the presence of carbides can influence ductility of the alloys with enhanced creep resistance. In the present study, the effect of niobium and carbon additions on the ductility of a Fe3Al-type alloy is investigated. The constant-deflection mode of the small punch test is used to compare fracture properties and their temperature dependence in the alloy with different amounts of carbon. It is shown that both the fracture energy and the deflection at maximum load are greater in the alloy with the greater carbon and that the ductility is not reduced by the presence of niobium carbides. The ductile-to-brittle transition temperature closely correlates with the temperature of phase transformation from D03 to B2 lattice. This temperature is greater in the alloy with lower carbon owing to greater amount of niobium solved in Fe3Al lattice. Complicated temperature dependence of the yield force can be ascribed to the flow stress anomaly inherent for this type of intermetallic alloys
Klíčová slova: ductility; Iron aluminides; small punch
Číslo projektu: GAP108/12/1452 (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Determination of Mechanical Properties of Materials by Small Punch and Other Miniature Techniques - Conference Proceedings, ISBN 978-80-260-0079-2

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/11104/0215256

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-135471


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav fyziky materiálů
Konferenční materiály > Příspěvky z konference