Sensitivity analysis of dendritic growth kinetics in a Bridgman furnace front tracking model
作者： R P Mooney , S McFadden
DOI: 10.1088/1757-899X/117/1/012012
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摘要: A directional solidification experiment of a Ti-Al-Nb-B-C alloy by power down method is simulated using Bridgman furnace front tracking model. The effect varying the dendritic growth parameters; C, columnar dendrite coefficient, and n, undercooling exponent, investigated. matrix coefficients exponents - at three levels each, based around law for Ti-46wt.%Al applied in simulations, on tip temperature, velocity, temperature gradient observed. simulation results show that velocity are practically unaffected use different parameters. However, predicted did vary to give required velocity. This finding has implications analysis microstructural transitions, such as Columnar Equiaxed Transition (CET). In conclusion, it suggested that, transient conditions, CET prediction criterion preferable one uses
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