A study of morphological stability during directional solidification of a Sn−Bi alloy in microgravity

2007 ◽  
pp. 77-94 ◽  
Author(s):  
J. J. Favier ◽  
P. Lehmann ◽  
B. Drevet ◽  
J. P. Garandet ◽  
D. Camel ◽  
...  
Keyword(s):  
Directional Solidification ◽  
Morphological Stability

The effect of anisotropic surface tension on the morphological stability of planar interface during directional solidification

2009 ◽  
Vol 18 (4) ◽  
pp. 1691-1699 ◽  
Author(s):  
Chen Ming-Wen ◽  
Lan Man ◽  
Yuan Lin ◽  
Wang Yu-Yan ◽  
Wang Zi-Dong ◽  
...  
Keyword(s):  
Surface Tension ◽  
Directional Solidification ◽  
Planar Interface ◽  
Morphological Stability ◽  
Anisotropic Surface

Morphological stability criteria during directional solidification

1987 ◽  
Vol 83 (1) ◽  
pp. 47-50
Author(s):  
B. Billia ◽  
H. Jamgotchian ◽  
L. Capella
Keyword(s):  
Directional Solidification ◽  
Morphological Stability ◽  
Stability Criteria

EFFECT OF ANISOTROPIC SURFACE TENSION ON THE MORPHOLOGICAL STABILITY OF DEEP CELLULAR CRYSTAL GROWTH IN DIRECTIONAL SOLIDIFICATION

2019 ◽  
Vol 26 (06) ◽  
pp. 1850210
Author(s):  
HAN JIANG ◽  
MING-WEN CHEN ◽  
ZI-DONG WANG
Keyword(s):  
Surface Tension ◽  
Crystal Growth ◽  
Directional Solidification ◽  
Low Frequency ◽  
Expansion Method ◽  
Frequency Instability ◽  
Morphological Stability ◽  
Global Instability ◽  
Anisotropic Surface ◽  
Low Frequency Instability

This paper studies the effect of anisotropic surface tension on the morphological stability of deep cellular crystal in directional solidification by using the matched asymptotic expansion method and multiple variable expansion method. We find that the morphological stability of deep cellular crystal growth with anisotropic surface tension shows the same mechanism as that with isotropic surface tension. The deep cellular crystal growth contains two types of global instability mechanisms: the global oscillatory instability, whose neutral modes yield strong oscillatory dendritic structures, and the low-frequency instability, whose neutral modes yield weakly oscillatory cellular structures. Anisotropic surface tension has the significant effect on the two global instability mechanisms. As the anisotropic surface tension increases, the unstable domain of global oscillatory instability decreases, whereas the unstable domain of the global low-frequency instability increases.

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