Measurements of dendritic growth and recalescence rates in undercooled melts of cobalt

Drewes, Karsten; Schaefers, Klaus; Rösner-Kuhn, Michael; Frohberg, Martin G.

doi:10.1016/s0921-5093(97)00475-9

Cited by 8 publications

(5 citation statements)

References 14 publications

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“…As reported earlier, the recalescence time for pure metal or solid solution alloy varies between 0.001 and 0.01 s [15,16], which is much less than that for eutectic system at the same undercooling (e.g. in Ni-Sn eutectic alloy [17], this value is about 0.1 s).…”

Section: Heat Flow Balancementioning

confidence: 84%

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Numerical description for the recalescence of bulk-undercooled Cu70Ni30 alloy

Yang

Liu

et al. 2009

Journal of Crystal Growth

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Section: Heat Flow Balancementioning

confidence: 84%

“…Finally, the residual liquid concentration can be updated by Eq. (15). This iteration process continues until the Gibbs energy of the newly estimated residual liquid is less than that of the solid.…”

Section: Numerical Proceduresmentioning

confidence: 99%

Numerical description for the recalescence of bulk-undercooled Cu70Ni30 alloy

Yang

Liu

et al. 2009

Journal of Crystal Growth

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“…For pure cobalt, Drewes et al 28 have shown that the velocity of the solid front (V) can be predicted by Eq. 2,…”

Section: Resultsmentioning

confidence: 99%

The effect of boron on the refinement of microstructure in cast cobalt alloys

et al. 2011

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Controlling the grain size and morphology of cast cobalt-based components is important for optimizing a component's in-service properties. This work investigates the role of boron on the grain size of binary cobalt-boron alloys by application of contemporary grain refinement theory. Boron solute is found to refine the width of the columnar grains but fails to promote the columnar to equiaxed transition. The lack of equiaxed grains is attributed to the thermal solidification conditions and a lack of potent nucleant particles. The refinement of the columnar grains with boron solute may be due to a growth restriction mechanism.

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“…High dendritic growth velocity results in the remarkable solute trapping and almost segregationless solidification according to rapid solidification studies of binary alloys [11,12]. However, the investigations about dendritic growth of alloys mainly focused on pure metals and binary alloys [13][14][15][16][17]. Experimental studies of rapid solidification for multicomponent alloys are scarce and the mechanism of interactions between different solutes is still unclear.…”

Section: Introductionmentioning

confidence: 99%

Rapid Solidification Characteristics of Highly Undercooled Liquid Ni-Cu-Mo-Ge Quaternary Alloy under Electromagnetic Levitation Condition

Chang¹,

Wang²,

Wei³

2015

Proceedings of the AASRI International Conference on Industrial Electronics and Applications (2015)

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The dendritic growth characteristics of undercooled liquid Ni-5%Cu-5%Mo-5%Ge quaternary alloy were investigated by electromagnetic levitation method. The measured dendritic growth velocity of α-Ni phase increases with undercooling according to a power law relation, which attains a value of 28 m/s at the maximum undercooling of 321 K (0.19T L). The microstructure morphology appears as coarse dendrites at small undercoolings, while it is refined into equiaxed grains at substantial undercoolings. Furthermore, all the solute elements Cu, Mo and Ge exhibit a significant solute trapping effect during rapid dendritic growth.

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Measurements of dendritic growth and recalescence rates in undercooled melts of cobalt

Cited by 8 publications

References 14 publications

Numerical description for the recalescence of bulk-undercooled Cu70Ni30 alloy

Numerical description for the recalescence of bulk-undercooled Cu70Ni30 alloy

The effect of boron on the refinement of microstructure in cast cobalt alloys

Rapid Solidification Characteristics of Highly Undercooled Liquid Ni-Cu-Mo-Ge Quaternary Alloy under Electromagnetic Levitation Condition

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