NATURAL CONVECTIVE EFFECTS IN DIRECTIONAL DENDRITIC SOLIDIFICATION OF BINARY METALLIC ALLOYS - DENDRITIC ARRAY MORPHOLOGY

被引:25
作者
DUPOUY, MD [1 ]
CAMEL, D [1 ]
FAVIER, JJ [1 ]
机构
[1] CENG,CEA,DTA,CEREM,DEM,SMGP,F-38041 GRENOBLE,FRANCE
关键词
D O I
10.1016/0022-0248(93)90054-Z
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
Natural convective effects on dendritic primary spacing and morphology, in directional dendritic solidification of Al-Cu binary alloys, have been studied experimentally as a function of density gradient orientation in the interdendritic liquid relative to the gravity vector. Diffusion controlled experiments in a microgravity environment have been used as a reference. In a previous paper [Dupouy et al., Acta Met. 37 (1989) 1143], the convective effects in terms of segregations were predicted and analysed. In the present paper, morphological aspects are discussed: it is found that the development of lateral dendritic branches is strongly affected by the flow configuration.
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收藏
页码:480 / 492
页数:13
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