Skip to Main content Skip to Navigation
Conference papers

In situ investigation of the effects of gravity level variations on the directional solidification microstructures during parabolic flights

L. Abou-Khalil 1 G. Salloum-Abou-Jaoude G. Reinhart 1 Ch. Pickmann G. Zimmermann Y. Houltz J. Li O. Janson H. Nguyen-Thi 1
1 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence
Abstract : In the framework of an ESA-MAP project entitled XRMON, directional solidification experiments of Al – 20 wt% Cu with in situ and real-time X-ray radiography were carried out during Parabolic Flight campaigns. Parabolic flights offer successions of periods with different gravity levels, allowing the investigation of the impact of gravity level variations on the solidification microstructure formation. Directional solidifications of refined Al – 20 wt% Cu alloy were investigated in a dedicated apparatus for a wide range of cooling rates and a constant temperature gradient. X-ray radiography was successfully used to observe the microstructure evolution following the variations of gravity level. During the columnar growth of the refined alloy a sharp increase of gravity level provoked the sudden nucleation of numerous grains ahead of the front. The most potent explanation of this effect is the variation of the liquid undercooling ahead of solid/liquid interface due to the changes of hydrostatic pressure in the melt.
Document type :
Conference papers
Complete list of metadata
https://hal-amu.archives-ouvertes.fr/hal-01452084
Contributor : Im2np Bibliométrie <>
Submitted on : Wednesday, February 1, 2017 - 4:03:35 PM
Last modification on : Friday, August 6, 2021 - 11:36:10 AM

Identifiers

Collections

UNIV-AMU | CNRS | UNIV-TLN | IM2NP | GDR_MFA

Citation

L. Abou-Khalil, G. Salloum-Abou-Jaoude, G. Reinhart, Ch. Pickmann, G. Zimmermann, et al.. In situ investigation of the effects of gravity level variations on the directional solidification microstructures during parabolic flights. TMS2016 Annual Meeting, Session: Materials Research in Reduced Gravity, Feb 2016, Nashville, Tennessee, United States. pp.43-50, ⟨10.1002/9781119274896.ch6⟩. ⟨hal-01452084⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

137