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The effect of carbon and silicon additions on the creep properties of Fe-40 at. % Al type alloys at elevated temperatures
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SYSNO ASEP 0364467 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The effect of carbon and silicon additions on the creep properties of Fe-40 at. % Al type alloys at elevated temperatures Author(s) Dobeš, Ferdinand (UFM-A) RID, ORCID
Kratochvíl, P. (CZ)
Vodičková, V. (CZ)Number of authors 3 Source Title Intermetallics. - : Elsevier - ISSN 0966-9795
Roč. 19, č. 10 (2011), s. 1526-1532Number of pages 7 s. Language eng - English Country GB - United Kingdom Keywords Iron aluminides ; creep Subject RIV JG - Metallurgy R&D Projects GA106/08/1238 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000294522400025 DOI https://doi.org/10.1016/j.intermet.2011.05.024 Annotation The mechanical properties of FeAl alloys with 39-43 at.% Al, C contents up to 4.9 at.% and Si contents up to 1.2 at.% were studied using uniaxial compressive creep at temperatures from 600 to 800 C. The stress and temperature dependence of the creep rate were determined by stepwise loading and evaluated in terms of the stress exponent n and the activation energy Q, respectively. These quantities can be interpreted by means of dislocation motion controlled by climb and by the presence of second-phase particles. The dislocation motion is obstructed by precipitates of carbide k in alloys E and F and by particles of Al4C3 in the alloys with either higher content of C or of C and Si. Both carbon and silicon improved the creep resistance, but the effect of silicon was more significant. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2012
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