The settling velocity of equiaxed dendrites can cause macrosegregation and influence the structure of the equiaxed zone during the casting solidification process. So an understanding of the settling characteristics is needed to predict the structure and segregation in castings. The settling velocity of NH4Cl equiaxed dendrites of non-spherical geometry was studied experimentally in an NH4Cl-70wt.%H2O solution. A calculation formula was proposed to calculate the settling velocity of sediment equiaxed dendrit...
【英文摘要】
The settling velocity of equiaxed dendrites can cause macrosegregation and influence the structure of the equiaxed zone during the casting solidification process. So an understanding of the settling characteristics is needed to predict the structure and segregation in castings. The settling velocity of NH4Cl equiaxed dendrites of non-spherical geometry was studied experimentally in an NH4Cl–70wt.%H2O solution. A calculation formula was proposed to calculate the settling velocity of sediment equiaxed dendrit...
【基金】
Project supported by the National Basic Research Program of China (Grant No. 2011CB10402);
the National Natural Science Foundation of China (Grant Nos. 50901061 and 50971102);
the Foundation of State Key Laboratory of Solidification Processing, China (Grant Nos. 02-TZ-2008 and 36-TP-2009)
【更新日期】
2013-03-05
【分类号】
TG21
【正文快照】
1. Introduction Free equiaxed dendrites are frequently observed in melts, growing from heterogeneous nucleation, fragmented den- drite arms, or initial nucleation on the mold wall or melt surface. [1–4] The sedimentation of equiaxed dendrites in a melt d
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