Journal article
A unified model of microsegregation and coarsening
Metallurgical and materials transactions. A, Physical metallurgy and materials science, Vol.30(8), pp.2183-2189
1999
DOI: 10.1007/s11661-999-0030-z
Abstract
Using a coordinate transform in a standard microsegregation model it is shown that the effect of coarsening on the dilution of the liquid phase can be accounted for by adding a dimensionless parameter α c to the back-diffusion Fourier number. Through theory, for the case of parabolic growth, and numerical experiments for the constant cooling rate, it is shown that a constant value of α c=0.1 is a sound choice across a wide range of casting and alloy conditions. This finding allows for the development of a unified model for microsegregation and coarsening. In particular, previous approximate microsegregation models can be readily modified to account for coarsening.
Details
- Title: Subtitle
- A unified model of microsegregation and coarsening
- Creators
- V. R VOLLER - Saint Anthony Falls Laboratory, Department of Civil Engineering, University of Minnesota, Minneapolis, MN 55455, United StatesC BECKERMANN - Department of Mechanical Engineering, The University of Iowa, Iowa City, IA 52242, United States
- Resource Type
- Journal article
- Publication Details
- Metallurgical and materials transactions. A, Physical metallurgy and materials science, Vol.30(8), pp.2183-2189
- Publisher
- Springer; New York, NY
- DOI
- 10.1007/s11661-999-0030-z
- ISSN
- 1073-5623
- eISSN
- 1543-1940
- Language
- English
- Date published
- 1999
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984064246202771
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