TY - JOUR
T1 - Phase-field study of the effects of the multi-controlling parameters on columnar dendrite during directional solidification in hexagonal materials
AU - Wang, Yongbiao
AU - Wei, Mingguang
AU - Liu, Xintian
AU - Chen, Cong
AU - Wu, Yujuan
AU - Peng, Liming
AU - Chen, Long Qing
N1 - Publisher Copyright:
© 2020, EDP Sciences, Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2020/7/1
Y1 - 2020/7/1
N2 - Abstract.: The growth of hexagonal columnar dendrite during directional solidification with respect to the multi-controlling parameters such as anisotropy, cooling rate, temperature gradient and orientation angle were investigated by a quantitative phase-field method, respectively. The simulation results show that the increase of anisotropy, cooling rate and temperature gradient can accelerate the solidification velocity of columnar dendrites. Among them, the cooling rate has the most significant effect on the solidification velocity of columnar dendrite. In contrast, the solidification velocity of columnar dendrite slows down with the increase of the orientation angle. Meanwhile, the primary dendrite spacing decreases with the increase of cooling rates and temperature gradient, and the primary dendrite arms are smooth. The primary dendrite spacing increases with the increase of anisotropy and orientation angle, which provides space for the development of secondary dendrite arms. In addition, the effects of cooling rate and temperature gradient on the solid volume fraction were also studied. Graphical abstract: [Figure not available: see fulltext.]
AB - Abstract.: The growth of hexagonal columnar dendrite during directional solidification with respect to the multi-controlling parameters such as anisotropy, cooling rate, temperature gradient and orientation angle were investigated by a quantitative phase-field method, respectively. The simulation results show that the increase of anisotropy, cooling rate and temperature gradient can accelerate the solidification velocity of columnar dendrites. Among them, the cooling rate has the most significant effect on the solidification velocity of columnar dendrite. In contrast, the solidification velocity of columnar dendrite slows down with the increase of the orientation angle. Meanwhile, the primary dendrite spacing decreases with the increase of cooling rates and temperature gradient, and the primary dendrite arms are smooth. The primary dendrite spacing increases with the increase of anisotropy and orientation angle, which provides space for the development of secondary dendrite arms. In addition, the effects of cooling rate and temperature gradient on the solid volume fraction were also studied. Graphical abstract: [Figure not available: see fulltext.]
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U2 - 10.1140/epje/i2020-11964-9
DO - 10.1140/epje/i2020-11964-9
M3 - Article
C2 - 32617715
AN - SCOPUS:85087238076
SN - 1292-8941
VL - 43
JO - European Physical Journal E
JF - European Physical Journal E
IS - 7
M1 - 41
ER -