DIFFUSION IN THE SEMISOLID REGION DURING DENDRITIC GROWTH

被引：25

作者：

ALLEN, DJ ^{[1
]}

HUNT, JD ^{[1
]}

机构：

[1] UNIV OXFORD, DEPT MET & SCI MAT, OXFORD, ENGLAND

来源：

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1979年 / 10卷 / 09期

关键词：

D O I：

10.1007/BF02811995

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Diffusion in the liquid during the later stages of cellular and dendritic solidification is described. A simple model is constructed, incorporating adaptations of the earlier treatments by Bower, Brody, and Flemings1,2 and Rohatgi and Adams:3 the apparent conflict between these treatments is discussed. Behind the growth front, the diffusion fields of neighboring primary arms spread laterally, meet and merge in an initial transient. This can take up a significant fraction of the solidification time, especially at high growth rates. After the initial transient has been completed, the supercooling of the interdendritic liquid is reduced, but concentration gradients in the liquid persist throughout solidification. © 1979 The Metallurgical of Society of AIME.

引用

页码：1389 / 1397

页数：9

共 46 条

[1] Allen D.J., 1979, SOLIDIMETAL SFICATIO, P39
[2] MELTING DURING SOLIDIFICATION
ALLEN, DJ
HUNT, JD
[J]. METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1976, 7 (05): : 767 - 770
[3] ALLEN DJ, 1976, THESIS OXFORD U
[4] BACKERUD L, 1975, SCAND J METALL, V4, P267
[5] BOWER TF, 1966, T METALL SOC AIME, V236, P624
[6] BRODY HD, 1966, T METALL SOC AIME, V236, P615
[7] Burden M. H., 1976, Metal Science, V10, P156
[8] CELLULAR AND DENDRITIC GROWTH .1.
BURDEN, MH
HUNT, JD
[J]. JOURNAL OF CRYSTAL GROWTH, 1974, 22 (02) : 99 - 108
[9] BURDEN MH, 1974, J CRYST GROWTH, V22, P109, DOI 10.1016/0022-0248(74)90127-4
[10] BURDEN MH, 1970, J I MET, V98, P249

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