In Situ Synchrotron X-ray Characterization of Microstructure Formation in Solidification Processing of Al-based Metallic Alloys
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概要
- 論文の詳細を見る
The microstructure formed during the solidification step has a major influence on the properties of materials processed by major techniques (casting, welding ...). In situ and real-time characterization by synchrotron X-ray imaging is the method of choice to unveil the dynamical formation of the solidification microstructure in metallic alloys, and thus provide precise data for the critical validation of the theoretical predictions that is needed for sound advancement of modeling and numerical simulation. After a description of the experimental procedure used at the European Synchrotron Radiation Facility (ESRF), dynamical phenomena in the formation of the grain structure and dendritic or equiaxed solidification microstructure in Al-based alloys are presented. Beyond fluid flow interaction, earth gravity induces stresses, deformation and fragmentation in the dendritic mush. Settling of dendrite arms and equiaxed grains thus occurs, in particular in the columnar to equiaxed transition. Other types of stresses and strains are caused by the mere formation of the solidification microstructure itself. In white-beam X-ray topography, stresses and strains are manifested by specific contrasts and breaking of the Laue images into several pieces. Finally, quantitative analysis of the grey level in radiographs enables the analysis of solute segregation, which noticeably results in solutal poisoning of growth when equiaxed grains are interacting.
- 社団法人 日本鉄鋼協会の論文
- 2010-12-15
著者
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Jung Hyejin
L2mp Cnrs - Universite Paul Cezanne
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Billia Bernard
L2mp Cnrs - Universite Paul Cezanne
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Nguyen-thi Henri
L2mp Cnrs - Universite Paul Cezanne
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Mangelinck-noel Nathalie
L2mp Cnrs - Universite Paul Cezanne
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Hartwig Jurgen
European Synchrotron Radiation Facility
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Mangelinck-noel Nathalie
Aix-marseille Universite
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Nguyen-thi Henri
Aix-marseille Universite
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Schenk Thomas
Institut Jean Lamour Ecole Des Mines De Nancy
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Hartwig Jurgen
European Synchrotron Radiation Facility (esrf)
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BILLIA Bernard
Aix-Marseille Universite
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BERGEON Nathalie
Aix-Marseille Universite
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JUNG Hyejin
Aix-Marseille Universite
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REINHART Guillaume
Aix-Marseille Universite
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BOGNO Aziz
Aix-Marseille Universite
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BUFFET Adeline
European Synchrotron Radiation Facility (ESRF)
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BARUCHEL Jose
European Synchrotron Radiation Facility (ESRF)
関連論文
- Validation of a Front-Tracking Model of the Columnar to Equiaxed Transition Using Solidification Results from the Maxus 7 Microgravity Platform
- Interfacial Properties of Silicon Structures Fabricated by Vacuum Grooved Surface Bonding Technology
- In Situ Synchrotron X-ray Characterization of Microstructure Formation in Solidification Processing of Al-based Metallic Alloys