Diffusion and Phase Transformations in Multi-Component Systems
Diffusion and Phase Transformations in Multi-Component Systems
复制标题
多组分系统中的扩散和相变
DOI：
10.4028/www.scientific.net/ddf.263.11
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发表时间：
2007
影响因子：
--
通讯作者：
G. Inden
中科院分区：
文献类型：
--
作者：
G. Inden
利用DICTRA软件对多组分体系中的扩散控制相变进行了模拟。结果表明，热处理过程中不仅析出了稳定相，而且还析出了亚稳相。在一定的过渡时间内，这些相出现在显微组织中，这可以通过模拟来预测。不同的反应区域是可能的：局部平衡是一个慢反应，局部平衡没有分配是一个快速反应，准平衡是一个在所有替代元素上没有扩散的区域。不同体制之间的转换导致了降水相带的发展。
The simulation of diffusion-controlled transformations in multi-component systems is presented using the software DICTRA. It is shown that not only stable phases precipitate during heat treatments, but also metastable phases. These phases appear in the microstructure for a certain interim time period, which can be predicted by the simulation. Various reaction regimes are possible: local equilibrium which is a slow reaction, local equilibrium with no partitioning which is a fast reaction, para-equilibrium which is a regime with no diffusion at all of the substitutional elements. The transition between the various regimes leads to the development of precipitation stases.