Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1583901 | Materials Science and Engineering: A | 2007 | 6 Pages |
Abstract
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)Â 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.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Krishanu Biswas, Gandham Phanikumar, Dieter M. Herlach, Kamanio Chattopadhyay,