Comparison of Cell Wall Microstructure of Aluminum Foams Produced by Melt Foaming and Gas Injection Foaming Processes

Abstract:

Aluminum foams from A356 base alloy were produced by both the melt foaming process and gas injection foaming process. A comparison of microstructures between the two kinds of aluminum foams was carried out. The related causes were analyzed to form the difference in microstructure. Results indicate that aluminum foams produced by different processes are distinct in metallurgical structure. The average thickness of cell wall, the species and area fraction of secondary phases or particles and other metallurgical features have been all comparatively studied. The difference in microstructure features of the cell walls will also make the aluminum foams different in mechanical properties. Therefore, we need to select proper foaming process for aluminum foams according to the property requirements in practical application.

• Periodical: Applied Mechanics and Materials (Volumes 457-458)
• Pages: 540-543
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.457-458.540
• Online since: October 2013
• Authors: Yu Tong Zhou, Yan Xiang Li*, Xing Nan Liu, Wen Wen Yuan
• Keywords: Aluminum Foam, Gas Injection Foaming Process, Melt Foaming Process, Microstructure

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