TY - JOUR
T1 - Primary cellular/dendritic spacing selection of Al-Zn alloy during unidirectional solidification
AU - Feng, J.
AU - Huang, W. D.
AU - Lin, X.
AU - Pan, Q. Y.
AU - Li, T.
AU - Zhou, Y. H.
PY - 1999
Y1 - 1999
N2 - Al-4.95 wt% Zn alloy is directionally solidified with Bridgman apparatus to investigate response of cellular/dendritic microstructures and primary spacing to the variation of growth velocity. The results show that, with increasing growth rate, there exist a transition from dendrite to cell and a wide distribution range in primary cellular/dendritic spacing. The maximum, λmax, minimum, λmin, and average primary spacing, λ̄, as functions of growth rate, V, can be given by λmax = 4578V-0.697, λmin = 1315.7V-0.6543, λ̄ = 3084.5V-0.6982, respectively. The experimental results are compared with the Hunt-Lu model, and a reasonable agreement is found.
AB - Al-4.95 wt% Zn alloy is directionally solidified with Bridgman apparatus to investigate response of cellular/dendritic microstructures and primary spacing to the variation of growth velocity. The results show that, with increasing growth rate, there exist a transition from dendrite to cell and a wide distribution range in primary cellular/dendritic spacing. The maximum, λmax, minimum, λmin, and average primary spacing, λ̄, as functions of growth rate, V, can be given by λmax = 4578V-0.697, λmin = 1315.7V-0.6543, λ̄ = 3084.5V-0.6982, respectively. The experimental results are compared with the Hunt-Lu model, and a reasonable agreement is found.
KW - Al-Zn alloy
KW - Cellular/dendritic growth
KW - Primary spacing
KW - Unidirectional solidification
UR - http://www.scopus.com/inward/record.url?scp=0033079854&partnerID=8YFLogxK
U2 - 10.1016/S0022-0248(98)00916-6
DO - 10.1016/S0022-0248(98)00916-6
M3 - 文章
AN - SCOPUS:0033079854
SN - 0022-0248
VL - 197
SP - 393
EP - 395
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
IS - 1-2
ER -