TY - JOUR
T1 - Tip Splitting Dynamics in Degenerate Seaweed Patterns of Aluminum Alloys Induced by Anisotropic Surface Tension
AU - Wang, Yumin
AU - Shi, Zhengwei
AU - Li, Shuangming
AU - Cao, Xin
AU - Yang, Bin
AU - Liu, Zhongli
AU - Xing, Hui
N1 - Publisher Copyright:
© 2023 American Chemical Society.
PY - 2023/4/5
Y1 - 2023/4/5
N2 - The formation of degenerate seaweed in Al-4.5 wt % Cu, Al-3 wt % Mg, and commercial A356 alloys during quasi-two-dimensional directional solidification is studied. By designing (100)[011]-and (−211)[111]-oriented planar-front seeds, the surface tension profiles are symmetrically arranged with respect to the temperature gradient direction. The results show that growth toward the surface tension maxima is preferred, and the tips tend to grow outward in both directions, leading to degenerate seaweed formation. The comparison of the degenerate seaweeds in the three Al alloys shows that the morphologic features are qualitatively similar. However, the anisotropic surface tension has a significant effect on the growth dynamics of the degenerate seaweed. This quantitatively indicates that Al alloys with a larger anisotropy tend to exhibit growth with a smaller tip spacing (λ) and a higher splitting frequency (f).
AB - The formation of degenerate seaweed in Al-4.5 wt % Cu, Al-3 wt % Mg, and commercial A356 alloys during quasi-two-dimensional directional solidification is studied. By designing (100)[011]-and (−211)[111]-oriented planar-front seeds, the surface tension profiles are symmetrically arranged with respect to the temperature gradient direction. The results show that growth toward the surface tension maxima is preferred, and the tips tend to grow outward in both directions, leading to degenerate seaweed formation. The comparison of the degenerate seaweeds in the three Al alloys shows that the morphologic features are qualitatively similar. However, the anisotropic surface tension has a significant effect on the growth dynamics of the degenerate seaweed. This quantitatively indicates that Al alloys with a larger anisotropy tend to exhibit growth with a smaller tip spacing (λ) and a higher splitting frequency (f).
UR - http://www.scopus.com/inward/record.url?scp=85148871706&partnerID=8YFLogxK
U2 - 10.1021/acs.cgd.2c01211
DO - 10.1021/acs.cgd.2c01211
M3 - 文章
AN - SCOPUS:85148871706
SN - 1528-7483
VL - 23
SP - 2190
EP - 2195
JO - Crystal Growth and Design
JF - Crystal Growth and Design
IS - 4
ER -