1. Precipitation in the Fe-38 at.% Al-1 at.% C alloy
- Author
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Kopeček, Jaromír, Haušild, Petr, Jurek, Karel, Jarošová, Markéta, Drahokoupil, Jan, Novák, Pavel, and Šíma, Vladimír
- Subjects
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TERNARY alloys , *PRECIPITATION (Chemistry) , *MICROSTRUCTURE , *CRYSTAL growth , *METAL castings , *GRAPHITE , *CRYSTALLIZATION , *SCANNING electron microscopy - Abstract
Abstract: The microstructure and crystallization behavior of a conventionally cast Fe-38 at.% Al-1 at.% C alloy and a set of crystals obtained from this alloy by the Bridgman and the floating-zone methods were investigated. A significant redistribution of elements during crystallization was observed. A two-phase microstructure of the κ-phase in the B2 matrix was found in regions with composition below 37 at.% Al and 0.5 at.% C. A microstructure consisting of the κ-phase and B2 matrix with a limited amount of graphite globules was obtained in the fast-solidified Bridgman sample. An enhanced growth of graphite lathes in the Bridgman crystal was observed at a growth rate of 28 mm h−1. These graphite lathes were oriented parallel to the {100} and {110} planes. The κ-phase precipitates have no orientation relationship with the matrix. [Copyright &y& Elsevier]
- Published
- 2010
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