Conference proceeding
Phase-Field Simulation of Dendrite Fragmentation
AIP conference proceedings
03/15/2012
Abstract
Dendrite fragmentation is an important mechanism for generating new grains during solidification of alloys. It also represents one of the main unknowns in current models of the columnar-to-equiaxed transition in the grain structure of castings. Three-dimensional phase-field simulations are performed of the directional solidification of a binary alloy. Melt convection and movement of solid are neglected so as to simulate a microgravity environment. Fragmentation of the initial dendritic structure is induced by a change in the applied thermal gradient or cooling rate. Parametric studies are performed to investigate the conditions necessary for fragmentation to occur, the rate at which fragmentation proceeds, and the yield of dendrite fragments. The present study represents a first step in developing a general fragmentation model for use in macro-scale simulations of casting processes.
Details
- Title: Subtitle
- Phase-Field Simulation of Dendrite Fragmentation
- Creators
- Maziar AghvamiChristoph Beckermann
- Resource Type
- Conference proceeding
- Publication Details
- AIP conference proceedings
- ISSN
- 0094-243X
- eISSN
- 1551-7616
- Language
- English
- Date published
- 03/15/2012
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984201545402771
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