Rapid dendrite growth in undercooled alloys
Journal Article
·
· Acta Metall.; (United States)
The theory of dendritic growth into undercooled alloy melts is extended to the case of large undercoolings, i.e. to high growth rates. This is done by applying the results of the complete stability analysis of a plane interface to the tip of an Ivantsov dendrite. For small Peclet numbers this model corresponds to a model published previously. For large Peclet numbers i.e. large undercoolings, however, the stability parameters become functions of Peclet numbers and cause drastic changes in the growth behaviour of the dendrite. Furthermore the limit of absolute stability is predicted when the undercooling is equal to the sum of the thermal unit undercooling and the equilibrium freezing range of the alloy.
- Research Organization:
- Dr. Muller Feindraht AG, 8800 Thalwil-Zurich
- OSTI ID:
- 5683399
- Journal Information:
- Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 35:4; ISSN AMETA
- Country of Publication:
- United States
- Language:
- English
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