Investigator: Ing. Ferdinand Dobeš, DrSc.
Number of Project: GA106/05/0409
Agency: Czech Science Foundation
Duration: 01. 01. 2005 - 31. 12. 2007

The alloys based on intermetallic compounds Fe3Al and FeAl - owing to their excellent resistance to oxidation and sulfidation - are attractive for many high temperature applications. Therefore, their creep properties are very important. Within the project, creep of the new developed alloys (Fe-28Al-4Cr-0.1Ce, Fe-30Al-4Cr-0.9Ti-1.9B and Fe-40Al-Ti-C) will be studied and analysed in terms of the stress exponent and the activation energy. Moreover the internal stress (and its complement, the effective stress) will be measured by the dip-test technique. It is expected that the various heat treatments will influence the microstructure of the alloys and thus the measured internal and effective stresses. The internal stress will be utilized as one of the internal variables in the physically based constitutive equations. These equations can serve for the prediction of behaviour under varying external conditions.

Dobeš F, Kratochvíl P, Milička K.
Creep of cast Fe-36Al-2Ti alloy
Intermetallics 14: 1199-1203, 2006

Dobeš, Ferdinand. - Kratochvíl, Petr - Milička, Karel - Pešička, Josef:
The effect of carbon on high temperature deformation of Fe40Al based alloys.
3rd Discussion Meeting on the Development of Innovative Iron Aluminium Alloys. Duesseldorf Max Planck Institute fuer Eisenforschung, 2006. p. 36

Dobeš, Ferdinand, Kratochvíl, P., Milička, Karel:
Compressive Creep of Fe3Al-type Iron Aluminide with Zr Additions.
5th International Conference on Materials Structure and Micromechanics of Fracture. Abstract booklet. Brno: VUTIUM, 2007 - (Šandera, P.) S. 104-104. ISBN 978-80-214-3434-9.

Kratochvíl, P., Dobeš, Ferdinand, Milička, Karel, Pešička, Josef:
The Change of the Mechanical Properties and of the Structure of the Alloy during Gradual Approach of its Composition from Fe-40Al to Fe-43Al-4C (at. %).
Discussion Meeting on the Development of Innovative Iron Aluminium Alloys /4./. Duebendorf : EMPA - Materials Science and Technology, 2007 - (Palm, M.; Spiegel, M.; Stein, F.; Krein, R.) S. 42-42.

Dobeš, Ferdinand, Milička, Karel, Kratochvíl, P., Pešička, Josef:
The Internal and Threshold Stresses in Creep of Fe-30Al-4Cr Intermetallic Alloy with Zr Addition.
Discussion Meeting on the Development of Innovative Iron Aluminium Alloys /4./. Duebendorf : EMPA - Materials Science and Technology, 2007 - (Palm, M.; Spiegel, M.; Stein, F.; Krein, R.) S. 59-59.