Mushy-zone Rayleigh number to describe macrosegregation and channel segregate formation during directional solidification of metallic alloys

Mushy-zone Rayleigh number to describe macrosegregation and channel segregate formation during directional solidification of metallic alloys

A recently defined mushy-zone Rayleigh number (R^sub aM^) that includes side-branching contributions to the mushy-zone permeability has been examined for its correlation with the longitudinal macrosegregation and channel segregate formation. The Rayleigh number shows (1) a strong correlation between...

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Veröffentlicht in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2004-09, Vol.35 (9), p.2927-2934
Hauptverfasser: TEWARI, S. N, TIWARI, R, MAGADI, G
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Directional solidification
Exact sciences and technology
Materials science
Melting
Metals
Metals. Metallurgy
Microstructure
Permeability
Quenching
Steel alloys
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Zusammenfassung:A recently defined mushy-zone Rayleigh number (R^sub aM^) that includes side-branching contributions to the mushy-zone permeability has been examined for its correlation with the longitudinal macrosegregation and channel segregate formation. The Rayleigh number shows (1) a strong correlation between the extent of longitudinal macrosegregation and increase in the mushy-zone convection and (2) a good ability to predict the formation of channel segregates during directional solidification. [PUBLICATION ABSTRACT]
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-004-0240-3