Details

Autor(en) / Beteiligte

• YU, L
• DING, G. L
• REYE, J
• OJHA, S. N
• TEWARI, S. N

Titel

Cellular/dendritic array tip morphology during directional solidification of pb-5.8 Wt Pct Sb alloy

Ist Teil von

• Metallurgical and materials transactions. A, Physical metallurgy and materials science, 1999-09, Vol.30 (9), p.2463-2472

Ort / Verlag

New York, NY: Springer

Erscheinungsjahr

1999

Link zum Volltext

Quelle

2022 ECC(Springer)

Beschreibungen/Notizen

• Cellular/dendritic array tip morphology has been examined in directionally solidified and quenched Pb-5.8 wt pct Sb alloy by a serial sectioning and 3D image reconstruction technique. There is a large scatter in the tip radius, the nearest neighbor spacing, and the mushy zone length, even among the immediately neighboring cells and dendrites. This scatter may be caused by the natural convection (in the mushy zone and in the bulk melt at the array tip), which also produces macrosegregation along the length of the directionally solidified samples. Even in the presence of convection, however, the tip radii are observed to be approximately proportional to the square of the primary spacings, and the radii are in a good quantitative agreement with the predictions from the model due to Hunt-Lu (1996). (Author)