Effect of composition and heat treatment on the fracture of melt-spun Fe-Al-Cr intermetallic alloys
- 1 June 1992
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 65 (6) , 1407-1418
- https://doi.org/10.1080/01418619208205613
Abstract
Fe-Al-Cr alloys in the composition range 50–78 at% Fe, 0–20 at.% Cr and 15–50 at.% Al were rapidly solidified using chill-block melt spinning. Observations of tensile fracture surfaces of as-spun and subsequently heat-treated ribbons revealed transitions from ductile to cleavage to intergranular failure with increasing Al-content. These transitions are related to hardness and to dislocation-antiphase-boundary interactions. Rapid solidification improved ductility only at compositions where there is a significant suppression of ordering and/or formation of thermal antiphase domains. Implications for ductility improvement are discussed in the light of these results.Keywords
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