Kinetic Effect-Dependent Seaweed Formation in Single-Crystal Al-2 Wt Pct Si Alloy by Laser Surface Remelting
Kinetic Effect-Dependent Seaweed Formation in Single-Crystal Al-2 Wt Pct Si Alloy by Laser Surface Remelting
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DOI：
10.1007/s11661-023-07260-0
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发表时间：
2023-12
期刊：
影响因子：
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通讯作者：
Yumin Wang;Shuangming Li;Cong Cao;Zhongli Liu;Hui Xing
中科院分区：
文献类型：
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作者：
Yumin Wang;Shuangming Li;Cong Cao;Zhongli Liu;Hui Xing
In this study, we investigated the effect of kinetic on seaweed pattern formation in an Al-2 wt pct Si alloy during laser surface remelting. Our findings showed that the cellular pattern growth could be linked to the strong anisotropy of the interface energy in the (100)[001]0 degand (100)[001]15 degorientations. However, at a small but finite interface energy anisotropy of the (100)[001]45 degorientation, degenerate seaweed can prevail under a scanning velocity of 10 mm/s. A 3D finite element numerical model of combined processing parameters showed that a high-temperature gradient (~106K/m) promoted the formation of degenerate seaweed. As the scanning velocity increased, the effects of interface kinetics and the interface energy are comparable, causing a transition from the degenerate to hyperbranched seaweed. Furthermore, in the (111)[01-1]0 degorientation, where the interfacial energy was nearly isotropic, the interface kinetics can become dominant and govern the seaweed cells growing along the scanning direction.Graphical Abstract
