Solidification microstructure and dynamics of metastable phase transformation in undercooled liquid Cu-Fe alloys
Solidification microstructure and dynamics of metastable phase transformation in undercooled liquid Cu-Fe alloys
复制标题
过冷液态铜铁合金的凝固组织和亚稳态相变动力学
DOI：
10.1016/j.actamat.2005.12.023
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发表时间：
2006-04-01
期刊：
影响因子：
9.4
通讯作者：
Ratke, L
中科院分区：
文献类型：
--
作者：
He, J;Zhao, JZ;Ratke, L
采用实验和数值模拟方法研究了亚稳态不互溶Cu-Fe合金雾化液滴的凝固行为。建立了一个定量分析亚稳液-液相变过程中微观组织演变的模型。该模型不仅考虑了少相球的成核、扩散生长和空间运动的共同作用，而且考虑了少相球与固/液界面之间的排斥作用。首先讨论了碰撞和凝聚对界面形态的影响.充分阐明了过冷液态Cu-Fe合金全贫Fe层的形成机理和亚稳相变动力学。(c)2006 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
The solidification behavior of an atomized droplet of a metastable, immiscible Cu-Fe alloy has been investigated experimentally and by numerical simulation. A model is presented to analyze quantitatively the microstructural evolution during the metastable liquid-liquid phase transformation. The model takes into account not only the common actions of nucleation, diffiusional growth, and spatial motion of the minority phase spheres, but also the repulsive interaction between the spheres and the solid/liquid interface. The effect of the interface morphology oil the collision and coagulation is first discussed. The formation mechanism of all Fe-poor layer and the kinetics of the metastable phase transformation in the undercooled liquid Cu-Fe alloy are sufficiently clarified. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.