Microsegregation Effect of Copper in Solidification of A356 Alloy

机译：铜在A356合金凝固中的微偏析作用

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In this study, the microsegregation effect of copper during solidification of A356.2 aluminum casting alloy was evaluated by using solidification simulation and a series of experimental works. Electron probe micro analysis (EPMA) and the computational simulation revealed clearly that copper as a solute element segregates during solidification and it becomes more significant as the solidification approaches its completion. This microsegregation effect of copper is due to accumulated copper solute ahead of the eutectic interface during solidification. Consequently, the presence of a higher content of copper in A356.2 aluminum casting alloy causes influence on the solidification characteristics of the alloy and forms copper enriched phases at the last region to solidify in the microstructures.

机译：在这项研究中，通过凝固模拟和一系列实验工作评估了A356.2铝铸造合金凝固过程中铜的微偏析效果。电子探针显微分析（EPMA）和计算仿真清楚地表明，作为固溶元素的铜在凝固过程中会偏析，并且随着凝固接近完成而变得更加重要。铜的这种微偏析作用是由于凝固过程中在共晶界面之前积累的铜溶质。因此，A356.2铝铸造合金中较高含量的铜会影响合金的凝固特性，并在最后一个区域形成富铜相，从而在微观结构中凝固。

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来源
《International Conference on Processing amp; Manufacturing of Advanced Materials; 20060704-08; Vancouver(CA)》|2006年|P.452456|共2页
会议地点 Vancouver(CA)
作者
J. I. Cho; X. Yan; C. S. Kang; I. H. Oh; J. S. Lee; H. T. Son; J. C. Bae;
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作者单位

Korea Institute of Industrial Technology, P.O. Box#1 Wolgye-dong, Gwangsan-gu, Gwangju, 506-824, Rep. of Korea;

Alcoa, Pittsburgh, Pennsylvania, USA;

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原文格式 PDF
正文语种 eng
中图分类工程材料一般性问题;
关键词
microsegregation; copper; solidification; Al-Si alloy; A356 alloy;

机译：微观偏析;铜;凝固; Al-Si合金; A356合金;

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Microsegregation Effect of Copper in Solidification of A356 Alloy

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