Institute of Physics of Materials AS CR, v. v. i. > Projects > Investigation of possibilities of strengthening of iron-aluminides-based alloys by second-phase particles

Investigation of possibilities of strengthening of iron-aluminides-based alloys by second-phase particles

Number of Project106/08/1238
AgencyGrantová agentura České republiky
Duration2007-12-31 - 2010-12-30

Anotace
Creep resistance of iron-aluminides-based alloys may be increased by a proper combination of solid solution hardening and the precipitation of thermally stable particles. Towards this aim, the exact knowledge of creep mechanisms is necessary. Creep behaviour of alloys strengthened by second-phase particles may be interpreted in terms of two basic concepts: (i) threshold stress concept and (ii) detachment concept. The application of both concepts in an interpretation of creep of iron aluminides is till now very limited and it will be one of the main tasks of the proposed project. The creep rate and its stress and temperature dependence will be evaluated and confronted with the theory. The detailed microscopical investigation of crept specimens is intended to verify the phenomenological conclusions by direct observations. The experiments within the Fe-Al system will také place both with Fe3Al and FeAl type materials with the additions of C, Zr, Ti and B.

2012

Kratochvíl P., Dobeš F., Pešička J., Málek P., Buršík J., Vodičková V., Hanus P.: Microstructure and high temperature mechanical properties of Zr-alloyed Fe3Al-type aluminides: The effect of carbon. Mater. Sci. Eng. A 548 (2012) 175-182


2011

Dobeš F., Kratochvíl P., Vodičková V.: The effect of carbon and silicon additions on the creep properties of Fe-40 at.% Al type alloys at elevated temperatures. Intermetallics 19 (2011) 1526-1532