Conference proceeding
ISS-Experiments of Columnar-to-Equiaxed Transition in Solidification Processing
NASA Center for AeroSpace Information (CASI). Conference Proceedings
09/01/2012
Abstract
The main topic of the research project CETSOL in the framework of the Microgravity Application Promotion (MAP) programme of the European Space Agency (ESA) is the investigation of the transition from columnar to equiaxed grain growth during solidification. Microgravity environment allows for suppression of buoyancy-driven melt flow and for growth of equiaxed grains free of sedimentation and buoyancy effects. This contribution will present first experimental results obtained in microgravity using hypo-eutectic AlSi alloys in the Materials Science Laboratory (MSL) on-board the International Space Station (ISS). The analysis of the experiments confirms the existence of a columnar to equiaxed transition, especially in the refined alloy. Temperature evolution and grain structure analysis provide critical values for the position, the temperature gradient and the solidification velocity at the columnar to equiaxed transition. These data will be used to improve modeling of solidification microstructures and grain structure on different lengths scales.
Details
- Title: Subtitle
- ISS-Experiments of Columnar-to-Equiaxed Transition in Solidification Processing
- Creators
- Laszlo SturzGerhard ZimmermannAlain KarmaCharles GandinBernard BilliaNathalie MagelinckHenry Nguyen-ThiDavid John BrowneWajira U MirihanageDaniela VossChristoph Beckermann
- Resource Type
- Conference proceeding
- Publication Details
- NASA Center for AeroSpace Information (CASI). Conference Proceedings
- Publisher
- NASA/Langley Research Center
- Language
- English
- Date published
- 09/01/2012
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984201548302771
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