2000
DOI: 10.1007/s11661-000-0144-9
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Mushy zone morphology during directional solidification of Pb-5.8 wt pct Sb alloy

Abstract: The Pb-5.8 wt pct Sb alloy was directionally solidified with a positive thermal gradient of 140 K cm Ϫ1 at a growth speed ranging from 0.8 to 30 m s Ϫ1, and then it was quenched to retain the mushy zone morphology. The morphology of the mushy zone along its entire length has been characterized by using a serial sectioning and three-dimensional image reconstruction technique. Variation in the cellular/dendritic shape factor, hydraulic radius of the interdendritic region, and fraction solid along the mushy zone … Show more

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Cited by 11 publications
(8 citation statements)
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“…The sample-sectioning and imageanalysis techniques have been described earlier. [39] The transverse images were also used to measure the corresponding fraction of interdendritic liquid. The primarydendrite-spacing data used in this article correspond to where N is the number of dendrites on a sample cross-sectional area of A.…”
Section: Methodsmentioning
confidence: 99%
“…The sample-sectioning and imageanalysis techniques have been described earlier. [39] The transverse images were also used to measure the corresponding fraction of interdendritic liquid. The primarydendrite-spacing data used in this article correspond to where N is the number of dendrites on a sample cross-sectional area of A.…”
Section: Methodsmentioning
confidence: 99%
“…As seen in the results, even though experiments were conducted under similar conditions (samples with the similar compositions, growth rate, and temperature gradient), experiments can give discrepancies in the results. This is because not only the growth rate, temperature gradient, and composition of the sample but also anisotropy of the solid-liquid interfacial energy, molecular attachment kinetic, [71] changing the growth directions, [72] convections, [70,73] ripening process, [74] the size, impurities, preparation (as-cast, extruded, etc. ), and heating and cooling rates of the sample affect the microhardness.…”
Section: The Effect Of Dendritic Spacing and Growth Rate On Microhmentioning
confidence: 99%
“…Only a few experimental studies have reported influences of interdendritic convection and direction of growth on dendrite arm spacings [21][22][23][24][25][26]. Convection can be caused by solidification shrinkage, sinking or floating of brokenoff dendrite segments, and the temperature or compositioninduced melt density inversion [27,28].…”
Section: Introductionmentioning
confidence: 99%