Impact of heterogeneous boundary nucleation on transformation kinetics and microstructure

被引:53
作者
Rickman, JM
Tong, WS
Barmak, K
机构
[1] Dept. of Mat. Sci. and Engineering, Lehigh University, Bethlehem
基金
美国国家科学基金会;
关键词
D O I
10.1016/S1359-6454(96)00245-5
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We examine quantitatively the impact of heterogenous nucleation on the temporal evolution of a phase transformation with particular emphasis on the correlation of nucleation site distribution and product phase microstructure. This is accomplished by investigating the spatial correlations in the transforming system via the calculation of several non-equilibrium, n-point correlation Functions and thereby defining associated transformation fractions and correlation lengths. Computer simulations of transformations are also employed in order to validate the theoretical description and to relate the microstructural features of the evolving phase to relevant length and time scales in the problem. Finally, our findings are related to the results of experimental calorimetric studies of phase formation in thin films. Copyright (C) 1997 Acta Metallurgica Inc.
引用
收藏
页码:1153 / 1166
页数:14
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