Analysis of single crystal casting process taking into account the shape of pigtail

被引：58

作者：

Esaka, H ^{[1
]}

Shinozuka, K ^{[1
]}

Tamura, M ^{[1
]}

机构：

[1] Natl Def Acad, Dept Mat Sci & Engn, Yokosuka, Kanagawa 2398686, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2005年 / 413卷

关键词：

single crystal casting; pigtail; unidirectional solidification; yield rate; preferred growth direction;

D O I：

10.1016/j.msea.2005.08.154

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Under the condition of unidirectional solidification of alloy, an engineering model for grain selection has been developed. This is a 2D, deterministic model, depending upon the theory of columnar dendrite growth. This engineering model is applied to single crystal casting process. The ratio between number of well oriented products and total number of trails is defined to be a yield rate. Here, if the direction of [001] of a selected single crystal is within 10 degrees from the long side of the product, is judged to be well oriented. The parameters for calculation are the angle, width and length of pigtail. The effect of these parameters on the yield rate has been investigated. In the range of this study, the yield rate does not exceed 90%. The yield rate decreases if the angle of pigtail increases or decreases. There are also the most suitable value of the diameter and length of pigtail in order to get high yield rate of single crystal casting. (c) 2005 Elsevier B.V.. All rights reserved.

引用

页码：151 / 155

页数：5

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