Phase-field study of the pattern formation in Al–Ag–Cu under the influence of the melt concentration
Phase-field study of the pattern formation in Al–Ag–Cu under the influence of the melt concentration
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DOI：
10.1016/j.commatsci.2016.04.025
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发表时间：
2016-08
影响因子：
3.3
通讯作者：
P. Steinmetz;M. Kellner;J. Hötzer;A. Dennstedt;B. Nestler
中科院分区：
文献类型：
--
作者：
P. Steinmetz;M. Kellner;J. Hötzer;A. Dennstedt;B. Nestler
在定向凝固三元共晶的单个横截面中，可以观察到各种微观结构图案。这些图案影响机械性能，因此有必要更好地了解微观结构形成过程。假设熔体浓度的局部变化会导致不同的图案。为了研究这种效应，应用了 Al-Ag-Cu 三元共晶点附近定向凝固的大规模三维相场模拟。使用统计方法对模拟中出现的不同模式进行比较和分析。模拟结果显示，在三元共晶点附近熔体浓度±1% 的范围内，存在不同的稳定模式。在实验显微照片中观察到相同的趋势。
In single transverse sections of directional solidified ternary eutectics, various microstructure patterns can be observed. These patterns influence the mechanical properties and it is therefore of interest to gain a better understanding of the microstructure formation process. It is assumed that local variations in the concentration of the melt lead to different patterns. To investigate this effect, large-scale three-dimensional phase-field simulations of directional solidification in the vicinity of the ternary eutectic point of Al–Ag–Cu are applied. The different arising patterns from the simulations are compared and analyzed with statistical methods. The simulations show different stable patterns within a range of ±1% of the melt concentration around the ternary eutectic point. The same tendencies are observed in experimental micrographs.