Foaming Behavior of AlSi8Mg4 Alloy in Closed Cavity

As a new lightweight and energy absorbing structure, aluminum foam special-shaped parts have broad application prospects in many industrial fields, especially in the automotive industry. Aluminum foam special-shaped parts are prepared by foamable precursors foaming in closed cavities. The foam forma...

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Bibliographic Details
Published in:International journal of metalcasting 2023-04, Vol.17 (2), p.947-958
Main Authors: Zhiqiang, Guo, Zhanhao, Feng, Guoyin, Zu, Xiaoguang, Yuan, Feng, Wang
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Materials Science
Metallic Materials
Structural Materials
Technical Paper
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Summary:As a new lightweight and energy absorbing structure, aluminum foam special-shaped parts have broad application prospects in many industrial fields, especially in the automotive industry. Aluminum foam special-shaped parts are prepared by foamable precursors foaming in closed cavities. The foam formation process is very different from free foaming; systematic researches on foaming behavior of AlSi8Mg4 precursors at fixed expansion rates (200–500%) in closed cavity are conducted. Results show that as foaming time increases, pore structure evolution shows an obvious homogenization trend except 500% expansion rate; with the increase in expansion rate, the volume of pore-free zone decreases gradually until it disappears; for 300 and 400% expansion rates, as foaming time increases, pore merging phenomenon gradually occurs, especially at 400% expansion rate. Different from the above rules, obvious free foaming characteristics are shown at 500% expansion rate.
ISSN:1939-5981
2163-3193
DOI:10.1007/s40962-022-00815-8