Back to Search
Start Over
Tailoring of dendritic microstructure in solidification processing by crucible vibration
- Source :
- Journal of Crystal Growth, Journal of Crystal Growth, Elsevier, 2005, 275 (1-2), pp.e1579-e1584. ⟨10.1016/j.jcrysgro.2004.11.223⟩, Journal of Crystal Growth, 2005, 275 (1-2), pp.e1579-e1584. ⟨10.1016/j.jcrysgro.2004.11.223⟩
- Publication Year :
- 2005
- Publisher :
- HAL CCSD, 2005.
-
Abstract
- Directional solidification of alloys, which allows the independent control of growth parameters (pulling velocity, temperature gradient), is an experimental method of choice for the investigation of many fundamental problems (e.g. microstructure formation and selection, segregation of chemical species) encountered in the processing of structural materials. Upward directional solidification is carried out on hypoeutectic Al-Ni alloys, under natural and controlled fluid-flow conditions. First, the influence of natural convection on solidified dendritic microstructure is analyzed as a function of growth parameters. Then, directional solidification experiments with axial vibration are performed. It results that crucible vibration can be used to either damp or control fluid flow in the melt, and thus tailor columnar or “equiaxed” dendritic mush. Advanced modeling and numerical simulation are essential to clarify and quantify the various physical effects. Microgravity benchmark experiments under diffusion transport, and possibly with crucible rotation, are foreseen using the Materials Science Laboratory of ESA on ISS.
- Subjects :
- 010302 applied physics
Equiaxed crystals
Natural convection
Materials science
Metallurgy
Crucible
02 engineering and technology
[CHIM.MATE]Chemical Sciences/Material chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Microstructure
01 natural sciences
7. Clean energy
Inorganic Chemistry
Temperature gradient
0103 physical sciences
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Materials Chemistry
Fluid dynamics
Composite material
0210 nano-technology
ComputingMilieux_MISCELLANEOUS
Eutectic system
Directional solidification
Subjects
Details
- Language :
- English
- ISSN :
- 00220248
- Database :
- OpenAIRE
- Journal :
- Journal of Crystal Growth, Journal of Crystal Growth, Elsevier, 2005, 275 (1-2), pp.e1579-e1584. ⟨10.1016/j.jcrysgro.2004.11.223⟩, Journal of Crystal Growth, 2005, 275 (1-2), pp.e1579-e1584. ⟨10.1016/j.jcrysgro.2004.11.223⟩
- Accession number :
- edsair.doi.dedup.....7c80db7778c816cd45fb3db427a891db