Modelling of phase transformation kinetics in Ti alloys – Isothermal treatments
Modelling of phase transformation kinetics in Ti alloys – Isothermal treatments
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DOI：
10.1016/j.actamat.2005.03.014
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发表时间：
2005-06
期刊：
影响因子：
9.4
通讯作者：
B. Appolaire;L. Héricher;E. Aeby-Gautier
中科院分区：
文献类型：
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作者：
B. Appolaire;L. Héricher;E. Aeby-Gautier
本文建立了一个能描述β亚稳钛合金高温组织形成的模型。它是基于成核的经典理论，并通过假设该过程仅由合金化化学物种的扩散控制而获得的生长定律。描述了两种形态：晶界allotriomorphs，和Widmanstätten板聚集在从allotriomorphs生长的殖民地。此外，为了得到相变的整体动力学，还引入了β晶界形核条件的统计描述。模型预测结果与实验结果吻合良好。
We have developed a model which is able to describe the formation of high temperature microstructures in β metastable titanium alloys. It is based on the classical theory of nucleation, and on growth laws obtained by assuming that the processes are controlled by the diffusion of the alloying chemical species only. Two morphologies are described: grain boundary allotriomorphs, and Widmanstätten plates gathered in colonies growing from the allotriomorphs. Moreover, a statistical description of the nucleation conditions on β grain boundaries has been introduced in order to obtain the global kinetics of the transformation. The model predictions proved to be in good agreement with experimental results.