Constrained Dendritic Growth and Solute Concentration Effects in Rapidly Solidified Co-Cr Alloys

2019 ◽  
Vol 50 (5) ◽  
pp. 2272-2278
Author(s):  
A. L. Ramirez-Ledesma ◽  
H. F. Lopez ◽  
J. A. Juarez-Islas
Keyword(s):  
Dendritic Growth ◽  
Solute Concentration ◽  
Concentration Effects ◽  
Rapidly Solidified

Cellular and dendritic growth in rapidly solidified AlFe and AlCu alloys

1994 ◽  
Vol 42 (5) ◽  
pp. 1653-1660 ◽  
Author(s):  
Shu-Zu Lu ◽  
J.D. Hunt ◽  
P. Gilgien ◽  
W. Kurz
Keyword(s):  
Dendritic Growth ◽  
Cu Alloys ◽  
Rapidly Solidified

Influence of Diffusion and Convective Transport on Dendritic Growth in Dilute Alloys

1981 ◽  
Vol 9 ◽  
Author(s):  
M. E. Glicksman ◽  
Narsingh Bahadur Singh ◽  
M. Chopra
Keyword(s):  
Crystal Growth ◽  
Kinetic Data ◽  
Dendritic Growth ◽  
Solute Concentration ◽  
Convective Transport ◽  
Morphological Stability ◽  
Dilute Alloys ◽  
Crystal Growth Kinetics ◽  
Growth System ◽  
Tip Radius

ABSTRACTExtensive experimentation has been carried out in which the kinetics and morphology of dendritic growth were measured as a function of thermal supercooling, solute concentration, and spatial orientation of the dendritic growth axis. The crystal growth system studied is succinonitrile [NC(CH2)2CN] with additions of argon (up to 0.1 mole %). This system is especially useful as a model for alloy studies because kinetic data are available for high purity (7–9's) succinonitrile. The addition of argon provides a simple, controllable dilute solute that now permits the first comparably detailed dendritic growth studies on binary alloys.One dramatic influence of the solute, at fixed thermal supercooling, is to increase the growth velocity (to a maximum) and correspondingly decrease intrinsic crystal dimensions (tip radius). Morphological measurements will be described in detail relating tip size, perturbation wavelength, supercooling, and solute concentration. The analysis of these effects based on morphological stability theory will also be discussed. Finally, experiments permitting the separation of convective and diffusive heat transport during crystal growth of succinonitrile will be described briefly. These studies clearly underscore the importance of gravitationally-induced buoyancy effects on crystal growth kinetics and morphology.

Incorporating an extended dendritic growth model into the CAFE model for rapidly solidified non-dilute alloys

2016 ◽  
Vol 668 ◽  
pp. 46-55 ◽  
Author(s):  
Jie Ma ◽  
Bo Wang ◽  
Shunli Zhao ◽  
Guangxin Wu ◽  
Jieyu Zhang ◽  
...  
Keyword(s):  
Growth Model ◽  
Dendritic Growth ◽  
Dilute Alloys ◽  
Rapidly Solidified

CELL TO DENDRITE TRANSITION IN TIN BASE ALLOYS

1960 ◽  
Vol 38 (8) ◽  
pp. 1077-1088 ◽  
Author(s):  
T. S. Plaskett ◽  
W. C. Winegard
Keyword(s):  
Temperature Gradient ◽  
Distribution Coefficient ◽  
Cell Size ◽  
Dendritic Growth ◽  
Solute Concentration ◽  
Cellular Growth ◽  
First Approximation ◽  
High Concentrations ◽  
Solid Liquid Interface ◽  
Solid Liquid

The transition from cellular growth to dendritic growth was investigated for dilute binary alloys of zone-refined tin with lead, bismuth, and antimony in terms of the rate of growth R, the temperature gradient in the liquid ahead of the solid-liquid interface G, and the solute concentration C0. It was found that a previous relationship describing the transition for lead base alloys applied, at least to a first approximation, for the low solute concentration tin results. At the high concentrations of solute, however, it was necessary to introduce another variable, namely the cell size at transition dt. The transition relationships only applied for alloy systems with a distribution coefficient k0, less than unity. For systems with k0 > 1 (antimony in tin) a k0 < 1 was used which was equivalent to the k0 > 1. A method is described for determining this "equivalent k0".

Sign in / Sign up

Export Citation Format

Share Document