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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/18760

Title: Lost Foam Casting of Periodic Cellular Materials with Aluminum and Magnesium Alloys
Authors: Ho, Samson Shing Chung
Advisor: Hibbard, Glenn D.
Department: Materials Science and Engineering
Keywords: Lost Foam
Truss
AZ91
A356
Lattice
cellular
Issue Date: 11-Feb-2010
Abstract: This study investigates the possibility of fabricating periodic cellular materials (PCMs) via the lost foam casting (LFC) process using aluminum alloy A356 and magnesium alloy AZ91. This approach combines the structural efficiency of PCM architectures with the processing advantages of near-net-shape LFC. An initial feasibility study fabricated corrugated A356 panels. This was followed by a study of casting variables such as pattern design, vacuum assistance, and alloying additions in order to improve the fillability of the small cross-section struts. Finally, integrated pyramidal sandwich panels having different relative densities were subjected to artificial aging treatments and subsequently tested in uniaxial compression. The A356 PCMs experienced a continuous increase after yielding while the AZ91 PCMs exhibited strut fracture after peak strength. The results showed the compressive yield strengths of this study are comparable with those previously reported PCMs produced by different fabrication methods.
URI: http://hdl.handle.net/1807/18760
Appears in Collections:Master
Department of Materials Science & Engineering - Master theses

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