Publication at Faculty of Mathematics and Physics |
2009
Abstract
Two Fe-Al alloys with Zr additions were prepared by vacuum induction melting and rolling at 1200 °C: a disordered (ferrite - A2) and D03 - ordered one. The data are compared to a similar Fe3Al - based alloy with lower Zr content investigated earlier.
Tensile and creep tests were performed at 600, 700, and 800 °C, where the disordered alloy maintains its A2 structure, and D03 - ordered alloys are transformed to B2-ordered structure. Transmission electron microscopy of the alloys crept at 600 °C showed precipitation of fine particles on dislocations, subgrain boudaries and also in the matrix.
Coarsening of these particles during creep at 800 °C takes place.