Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8001148 | Journal of Alloys and Compounds | 2014 | 4 Pages |
Abstract
An efficient way of using iron to optimize the as-cast microstructure of Al-Si alloys was investigated in this study. Before pouring, Al-12.1%Si-0.1%Fe melts were cooled from 830 °C and held for 10 min at 587 °C, 600 °C and 620 °C, respectively, and then these melts were homogenized at 830 °C for another 20 min. Both the cooling curves of melts and the as-cast microstructure indicate that a lower-temperature holding can result in a considerable amount of (AlFeSi) clusters which subsequently enhance the silicon phase nucleation. Due to the late occurrence of these (AlFeSi) clusters in naturally cooled melts and without a low-temperature holding, the enhancement effect of iron on silicon nucleation is too weak and often neglected.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Yong Zhang, Hongliang Zheng, Yue Liu, Lei Shi, Qingming Zhao, Xuelei Tian,