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Divorced eutectic growth in a ternary Al-Mn-Si alloy under microgravity

U. Hecht,, S. Fries, S. Rex

First International Symposium on Microgravity Research and Applications in Physical Sciences and Biotechnology, 454, 565-572, (2001)

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We report on first experiments dedicated to understanding a particular form of divorced eutectic growth that develops along the univariant eutectic reaction: Liquid --> a-Al + a(AlMnSi)+ Liquid ' during unidirectional solidification of the hypoeutectic ternary alloy AI-Mn I wt%-Si 3wt%. We show that this growth mode is not oscillatory, though it leads to a banded distribution of alpha (AlMnSi)-particles. An experiment in microgravity, performed during the Spacehab mission STS-95 in November 1998, shows that particle size and distribution is velocity dependent, a fact that on earth is masked by gravity. The microgravity experiment was performed in ESA's Advanced Gradient Heating Facility, AGHF.

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{"type":"inproceedings", "name":"u.hecht,20011", "author":"U. Hecht, and S. Fries and S. Rex", "title":"Divorced eutectic growth in a ternary AlMnSi alloy under microgravity", "journal":"First International Symposium on Microgravity Research and Applications in Physical Sciences and Biotechnology", "volume":"454", "OPTnumber":"", "OPTmonth":"1", "year":"2001", "OPTpages":"565-572", "OPTnote":"", "OPTkey":"", "DOI":""}
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