Nucleation and phase selection in undercooled Fe-Cr-Ni melts .1. Theoretical analysis of nucleation behavior

被引：57
|
作者：
Volkmann, T [1 ]
Loser, W [1 ]
Herlach, DM [1 ]
机构：
[1] INST MET MAT,IFW,INST SOLID STATE & MAT RES,D-01171 DRESDEN,GERMANY
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1997年 / 28卷 / 02期
关键词：
D O I：
10.1007/s11661-997-0146-y
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The selection of the primary solidifying phase in undercooled stainless steel melts is theoretically analyzed in terms of nucleation theory. Nucleation phenomena are considered using different models for the solid-liquid interface energy. The classical nucleation theory for sharp interfaces and an improved modification, the diffuse interface theory, are applied.:The influence of deviations of the nucleus composition from the overall: alloy composition is also revealed. A preferred nucleation of the metastable bcc phase in fee equilibrium solidification-type alloys is predicted. The critical undercooling of metastable crystallization as a function of alloy composition is calculated for an isoplethal section at 69 at. pct Fe of Fe69Cr31-xNix alloys. The results are summarized in a phase selection diagram predicting the primary solidification mode as a function of undercooling and melt composition.
引用
收藏
页码：453 / 460
页数：8
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