Number of the records: 1
Anomalous high temperature creep behaviour of an Al-8.5Fe-1.3V-1.7Si (8009Al type) alloy reinforced with alumina short fibres
- 1.
SYSNO ASEP 0178187 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Anomalous high temperature creep behaviour of an Al-8.5Fe-1.3V-1.7Si (8009Al type) alloy reinforced with alumina short fibres Author(s) Čadek, Josef (UFM-A)
Kuchařová, Květa (UFM-A) RID, ORCIDSource Title Kovové materiály. - : Ústav fyziky materiálu AV ČR, v. v. i. - : Ústav materiálov a mechaniky strojov SAV. - : Ústav materiálového výskumu SAV. - : Strojnícka fakulta STU - ISSN 0023-432X
Roč. 42, č. 1 (2004), s. 9-20Number of pages 11 s. Language eng - English Country SK - Slovakia Keywords High temperature creep- load transfer Subject RIV JI - Composite Materials R&D Projects IBS2041001 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z2041904 - UFM-A Annotation Creep in an Al-8.5Fe-1.3V-1.7Si (8009Al type) alloy dispersion strengthened with fine Al-12(Fe,V)(3)Si phase particles at temperatures 798-848 K is not associated with a true threshold and the same holds for the Alloy reinforced with alumina short fibres. While the true activation energy of creep in the Alloy is higher than the activation enthalpy of lattice self-diffusion in aluminium due to the energy of athermal detachment of dislocations from dispersed particles, this is not the case of the Composite. The true activation energy of creep in the latter is anomalously low and the creep behaviour cannot be described by the creep equation that holds for the Alloy, but contains the factor by which the flow stress in the dispersion strengthened matrix is reduced due to load transfer. Nevertheless, the creep strength of the Composite is, at the certain conditions at least, by a factor up to six orders of magnitude higher than that of the Alloy. This creep strength increment due to alumina short fibre reinforcement is accounted for in terms of the load transfer effect. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2004
Number of the records: 1