An Evaluation of Primary Dendrite Trunk Diameters in Directionally Solidified Al-Si Alloys

被引：6

作者：

Tewari, S. N. ^{[1
]}

Grugel, R. N. ^{[2
]}

Poirier, D. R. ^{[3
]}

机构：

[1] Cleveland State Univ, Dept Chem & Biomed Engn, Cleveland, OH 44115 USA

[2] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA

[3] Univ Arizona, Dept Mat Sci & Engn, Tucson, AZ 85721 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2014年 / 45A卷 / 11期

关键词：

ARRAY GROWTH; STRUCTURE PREDICTIONS; STABILITY;

D O I：

10.1007/s11661-014-2438-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The primary dendrite trunk diameters of Al-Si alloys that were directionally solidified over a range of processing conditions have been evaluated. The empirical data are analyzed with a model that is an extension of one used to describe the ripening of dendrite arms. The analysis, based primarily on an assessment of secondary dendrite arm dissolution in the mushy zone, fits well with the experimental data. It is suggested that the primary dendrite trunk diameter is a useful metric that correlates well with the actual solidification processing parameters, and complements the conventionally used primary, secondary, and tertiary arm spacings.

引用

页码：4758 / 4761

页数：4

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