In Situ Particle Layer Formation in a Al-Mn-Si Ternary Eutectic Alloy: Ground Reference and Microgravity Experiments

Bin Zhou; Ludo Froyen

doi:10.4028/www.scientific.net/MSF.790-791.28

Paper Titles

Preface, Inaugural, Memoriam, Organization and Committees

ESA's Cooperative Strategy and Current Program in Materials Science in Space
p.3

Columnar-to-Equiaxed Transition in Solidification Processing of AlSi7 Alloys in Microgravity the CETSOL Project
p.12

Non-Equilibrium Processing of Ni-Si Alloys at High Undercooling and High Cooling Rates
p.22

In Situ Particle Layer Formation in a Al-Mn-Si Ternary Eutectic Alloy: Ground Reference and Microgravity Experiments
p.28

Phase Field Modeling of β(Ti) Solidification in Ti-45at.%Al: Columnar Dendrite Growth at Various Gravity Levels
p.34

Formation of Intermetallic Phases in AlSi7Fe1 Alloy Processed Onboard the ISS
p.40

Modelling of Al-7%wtSi-1wt%Fe Ternary Alloy: Application to Space Experiments with a Rotating Magnetic Field
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Microgravity and Hypergravity Observations of Equiaxed Solidification of Al-Cu Alloys Using In Situ X-Radiography Recorded in Real-Time on Board a Parabolic Flight
p.52

HomeMaterials Science ForumMaterials Science Forum Vols. 790-791In Situ Particle Layer Formation in a Al-Mn-Si...

In Situ Particle Layer Formation in a Al-Mn-Si Ternary Eutectic Alloy: Ground Reference and Microgravity Experiments

Abstract:

A special type of divorced eutectic growth mode (symbiotic growth) in a ternary Al-Mn-Si alloy, triggered by addition of titanium boride (TiB2) has been studied under both ground and microgravity conditions. During directional solidification, α (AlMnSi) particles nucleate ahead of the planar solidification front and are pushed and later engulfed by the interface forming a banded particle layer structure. The presence of fine titanium boride particles (clusters) in front of the growing α (AlMnSi) particles makes the interaction between the intermetallic α (AlMnSi) particles and solidification front much more complex than most proposed models for particle/interface interactions. Microgravity experiments can eliminate the gravity related effects and thus provide an opportunity to better understand the formation mechanism of symbiotic growth. In this study, hypoeutectic Al-1Mn-3Si alloys with addition of 0.33 wt% TiB2 were directionally solidified in ESA Solidification and Quenching Furnace (SQF) on board of the International Space Station (ISS). The ground experiment was conducted in a replica of this furnace prior to the microgravity experiments. Non-destructive X-ray tomography and its 3D reconstruction software was used to characterize the particles and their distribution. Comparison between ground and microgravity experiment results is presented. The particle pushing and engulfment of symbiotic growth is discussed based on a particle pushing and engulfment model.

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Periodical:

Materials Science Forum (Volumes 790-791)

Pages:

28-33

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.790-791.28

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Online since:

May 2014

Authors:

Bin Zhou*, Ludo Froyen

Keywords:

Al-Mn-Si, Directional Solidification, Microgravity, Particle Pushing/Engulfment, Ternary Eutectic

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References

[1] D. Stefanescu, Science and Engineering of Casting Solidification, Kluwer Academic/Plenum Publishers, New York, (2002).

Google Scholar

[2] U. Hecht, S.G. Fries and S. Rex, Divorced Eutectic Growth in a Ternary Al-Mn-Si Alloy Under Microgravity, First International Symposium on Microgravity Research and Applications in Physical Sciences and Biotechnology, 454, (2001) 565-572.

Google Scholar

[3] S. Ebzeeva and L. Froyen, Symbiotic univariant eutectic growth in a ternary Al-alloy, Proceedings of the 5th Decennial International Conference on Solidification Processing, Sheffield, (2007) 350-354.

Google Scholar

[4] Rex, S., U. Hecht, and A. Drevermann, Experimental performance within the SCA prototype test 1 using ESA's solidification and quench furnace (MSL-SQF) on ground, in Solidification and Gravity Iv, R. Roosz, M. Rettenmayr, and Z. Gacsi, (2006).

Google Scholar

[5] S. Ebzeeva, Experimental study of univariant eutectic growth in directionally solidified Al-Mn-Si alloys: effects of the TiB2 addition in PhD thesis: Univariant Eutectic Growth In Ternary Aluminum Alloys, (2010).

DOI: 10.31274/etd-180810-4286

Google Scholar

[6] S. Sen, et al., In situ observations of interaction between particulate agglomerates and an advancing planar solid liquid interface: microgravity experiments. Journal of Crystal Growth, 204(1-2), (1999) 238-242.

DOI: 10.1016/s0022-0248(99)00198-0

Google Scholar