MORPHOLOGIES OF PRIMARY AL3FE IN BRIDGMAN SOLIDIFICATION AND TIG WELD TRAVERSING OF HYPEREUTECTIC AL-FE ALLOYS

被引：20

作者：

LIANG, D ^{[1
]}

JONES, H ^{[1
]}

机构：

[1] UNIV SHEFFIELD,DEPT ENGN MAT,SHEFFIELD S1 4DU,ENGLAND

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1993年 / 173卷 / 1-2期

关键词：

D O I：

10.1016/0921-5093(93)90197-M

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This study indicates that the final morphology of primary Al3Fe in Bridgman solidification and TIG weld traversing of Al-Fe alloys is dependent on both the growth velocity and alloy concentration. With an increase in growth velocity, the morphology changes from clustered and microfaceted to being plate-like, finally becoming needle-like with or without a star-like transverse section. The initial morphology of plate-like primary Al3Fe is a needle-like dendritic form with a starlike transverse section behind the tip. A route for the formation of the plate-like primary Al3Fe from such needle-like dendrite tips is proposed.

引用

页码：109 / 114

页数：6

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