期刊
SCRIPTA MATERIALIA
卷 60, 期 7, 页码 516-519出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2008.11.048
关键词
X-ray radiography; Image analysis; Aluminum Alloys; Intermetallics; Kinetics
类别
资金
- Ford Motor Company
- Imperial College London
- SRS Daresbury Laboratory Beam [50264]
- EPSRC [EP/F001452/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F001452/1] Funding Source: researchfish
In situ synchrotron radiography of Fe-rich intermetallic formation was performed during the solidification of an Al-7.5Si3.5Cu-0.8Fe (wt.%) alloy. Growth kinetics was quantified by segmenting the Fe-rich intermetallic phases and nucleation temperatures were determined by extrapolating to zero size. Fe-rich beta-intermetallics nucleated between 550 and 570 degrees C, growing initially at an instantaneous tip velocity of 100 mu m s(-1), and slowing to 10 mu m s(-1) towards the end of growth. Final plate size was controlled by local Fe concentration and alpha-Al impingement. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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