Document Type

Article

Publication Date

5-1996

Publication Title

Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

Abstract

Thermosolutal convection in the dendritic mushy zone occurs during directional solidification of hypoeutectic lead tin alloys in a positive thermal gradient, with the melt on the top and the solid below. This results in macrosegregation along the length of the solidified samples. The extent of macrosegregation increases with increasing primary dendrite spacings for constant mushy zone length. For constant primary spacings, the macrosegregation increases with decreasing mushy zone length. Presence of convection reduces the primary dendrite spacings. However, convection in the interdendritic melt has significantly more influence on the spacings as compared with that in the overlying melt, which is caused by the solutal buildup at the dendrite tips.

Original Citation

Tewari, S.N., & Shah, R. (1996). Macrosegregation During Dendritic Arrayed Growth of Hypoeutectic Pb-Sn Alloys: Influence of Primary Arm Spacing and Mushy Zone Length. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 27, 1353-1362.

Volume

27

Issue

5

DOI

10.1007/BF02649872

Version

Publisher's PDF

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