Journal article
Prediction of columnar to equiaxed transition during diffusion-controlled dendritic alloy solidification
Metallurgical and materials transactions. A, Physical metallurgy and materials science, Vol.25(5), pp.1081-1093
1994
DOI: 10.1007/BF02652282
Abstract
A model is presented to predict the columnar to equiaxed transition (CET) in alloy castings. The model is based on a multiphase approach and accounts for heat and solute diffusion, as well as for grain nucleation, growth, and morphology. The model equations are applicable to both columnar and equiaxed dendritic solidification, thus offering an efficient single-domain formulation. A fixed grid, fully implicit finite-difference procedure is employed in the numerical solution, and a novel front tracking technique is incorporated that is also implicit in nature and readily applies to multidimensional situations. Calculations are performed for one-dimensional (1-D) and two-dimensional (2-D) castings of Al-Cu and Sn-Pb alloys. The calculated CET positions are compared with previous measurements in a (1-D) ingot cast under well-controlled conditions, and good agreement is found. The effects of various casting parameters on the CET are numerically explored.
Details
- Title: Subtitle
- Prediction of columnar to equiaxed transition during diffusion-controlled dendritic alloy solidification
- Creators
- C. Y WANG - Univ. Iowa, dep. mechanical eng., Iowa City IA 52242, United StatesC BECKERMANN - Univ. Iowa, dep. mechanical eng., Iowa City IA 52242, United States
- Resource Type
- Journal article
- Publication Details
- Metallurgical and materials transactions. A, Physical metallurgy and materials science, Vol.25(5), pp.1081-1093
- Publisher
- Springer; New York, NY
- DOI
- 10.1007/BF02652282
- ISSN
- 1073-5623
- eISSN
- 1543-1940
- Language
- English
- Date published
- 1994
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984064571502771
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