The columnar to equiaxed transition during solidification of Sn-Pb alloys

被引：59

作者：

Siqueira, CA ^{[1
]}

Cheung, N ^{[1
]}

Garcia, A ^{[1
]}

机构：

[1] Univ Estadual Campinas, UNICAMP, Dept Mat Engn, BR-13083970 Campinas, SP, Brazil

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2003年 / 351卷 / 1-2期

关键词：

alloys; casting; solidification; macrostructure;

D O I：

10.1016/S0925-8388(02)01026-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In the present article, some important trends are shown regarding the influence of solidification thermal parameters on the columnar to equiaxed transition (CET) during the unsteady state solidification of Sn-Pb alloys. A comparison of the results obtained in the present work with results from the literature concerning similar experiments, but undertaken under conditions of lower heat transfer efficiency at the metal-mold interface, has shown that a realistic CET criterion should be based on a critical cooling rate at the dendrite tips of about 0.014 K/s, which depends only on the alloy system. The effects of melt superheat, solute concentration and metal-mold heat transfer coefficient on the CET position are also investigated. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：126 / 134

页数：9

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