TY - JOUR
T1 - An evaluation of primary dendrite trunk diameters in directionally solidified Al-Si alloys
AU - Tewari, S. N.
AU - Grugel, R. N.
AU - Poirier, D. R.
N1 - Funding Information:
The authors appreciate and acknowledge the support provided by NASA Grant NNX08AN49G, and the NASA Microgravity Materials Science program. One of the authors (RNG) wishes to acknowledge Professor W. Kurz of the Ecole Polytechnique Federal de Lausanne for the time in his laboratory which generated the data shown in Figures 5 and 6.
PY - 2014/10
Y1 - 2014/10
N2 - The primary dendrite trunk diameters of Al-Si alloys that were directionally solidified over a range of processing conditions have been evaluated. The empirical data are analyzed with a model that is an extension of one used to describe the ripening of dendrite arms. The analysis, based primarily on an assessment of secondary dendrite arm dissolution in the mushy zone, fits well with the experimental data. It is suggested that the primary dendrite trunk diameter is a useful metric that correlates well with the actual solidification processing parameters, and complements the conventionally used primary, secondary, and tertiary arm spacings.
AB - The primary dendrite trunk diameters of Al-Si alloys that were directionally solidified over a range of processing conditions have been evaluated. The empirical data are analyzed with a model that is an extension of one used to describe the ripening of dendrite arms. The analysis, based primarily on an assessment of secondary dendrite arm dissolution in the mushy zone, fits well with the experimental data. It is suggested that the primary dendrite trunk diameter is a useful metric that correlates well with the actual solidification processing parameters, and complements the conventionally used primary, secondary, and tertiary arm spacings.
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U2 - 10.1007/s11661-014-2438-3
DO - 10.1007/s11661-014-2438-3
M3 - Article
AN - SCOPUS:84906783840
SN - 1073-5623
VL - 45
SP - 4758
EP - 4761
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 11
ER -