Journal article
Effect of melt convection and solid transport on macrosegregation and grain structure in equiaxed Al–Cu alloys
Materials science & engineering. A, Structural materials : properties, microstructure and processing, Vol.347(1), pp.186-197
2003
DOI: 10.1016/S0921-5093(02)00592-0
Abstract
Macrosegregation in metal casting can be caused by thermal and solutal melt convection, and the transport of unattached solid crystals. These free grains can be a result of, for example, nucleation in the bulk liquid or dendrite fragmentation. In an effort to develop a comprehensive numerical model for the casting of alloys, an experimental study has been conducted to generate benchmark data with which such a solidification model could be tested. The specific goal of the experiments was to examine equiaxed solidification in situations where sinking of grains is (and is not) expected. The objectives were: (1) experimentally study the effects of solid transport and thermosolutal convection on macrosegregation and grain size distribution patterns; and (2) provide a complete set of controlled thermal boundary conditions, temperature data, segregation data, and grain size data, to validate numerical codes. The alloys used were Al–1wt.%–Cu, and Al–10wt.%–Cu with various amounts of the grain refiner TiB
2 added. Cylindrical samples were either cooled from the top, or the bottom. Several trends in the data are apparent and provide good starting points for comparisons to numerical models.
Details
- Title: Subtitle
- Effect of melt convection and solid transport on macrosegregation and grain structure in equiaxed Al–Cu alloys
- Creators
- Rodney S Rerko - Department of Mechanical Engineering, The University of Iowa, Iowa, IA 52242-1527, USAHenry C de Groh - NASA Glenn Research Center, m.s. 105-1, Cleveland, OH 44135, USAChristoph Beckermann - Department of Mechanical Engineering, The University of Iowa, Iowa, IA 52242-1527, USA
- Resource Type
- Journal article
- Publication Details
- Materials science & engineering. A, Structural materials : properties, microstructure and processing, Vol.347(1), pp.186-197
- Publisher
- Elsevier B.V
- DOI
- 10.1016/S0921-5093(02)00592-0
- ISSN
- 0921-5093
- eISSN
- 1873-4936
- Language
- English
- Date published
- 2003
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984064565202771
Metrics
18 Record Views