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Non-equilibrium solidification of concentrated Fe–Ge alloys

Biswas, Krishanu and Phanikumar, Gandham and Herlach, Dieter M and Chattopadhyay, Kamanio (2007) Non-equilibrium solidification of concentrated Fe–Ge alloys. In: Materials Science and Engineering A, 449-45 . pp. 12-17.

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The solidification of concentrated alloys containing ordered compounds is less well understood. These alloys often exhibit complex phase change like peritectic reaction during liquid to solid transformation. The Fe-rich part of Fe–Ge binary alloy system consists of several critical points and ordered–disorder transitions and can be used as a model system to study the effect of departure from equilibrium on the solidification microstructure. In order to understand the phase selection and morphological transitions, undercooling and recalescence behaviour; growth rate of the solidifying phases and microstructure need to be explored.In the present paper, we summarise the results obtained in several iron rich alloy compositions (Fe–(14–25) at.% Ge) using techniques of melt quenching, levitation and laser resolidification. These results provide insight to the current theories of dendritic growth and reveals possibility of a new pathway for phase evolution in peritectic alloys at high undercooling involving a massive transformation.

Item Type: Journal Article
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Additional Information: Copyright of this article belongs to Elsevier. This article is also published in Proceedings of the 12th International Conference on Rapidly Quenched & Metastable Materials.
Keywords: Undercooling;Containerless processing;Rapid solidification;Metastable phases;Laser resolidification.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 28 Jul 2008
Last Modified: 19 Sep 2010 04:48
URI: http://eprints.iisc.ernet.in/id/eprint/15259

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