Reduced-pressure foaming of aluminum alloys
GS Vinod Kumar, M Mukherjee… - … Materials Transactions A, 2013 - Springer
Metallurgical and Materials Transactions A, 2013•Springer
We developed a novel process for foaming aluminum and its alloys without using a blowing
agent. The process involves a designated apparatus in which molten aluminum and its
alloys are first foamed under reduced pressure and then solidified quickly. Foaming was
done for pure aluminum (99.99 pct) and AlMg5 alloy not containing stabilizing particles and
AlMg5 and AlSi9Mg5 alloys containing 5 vol pct SiO 2 particles. We discuss the foaming
mechanism and develop a model for estimating the porosity that can be achieved in this …
agent. The process involves a designated apparatus in which molten aluminum and its
alloys are first foamed under reduced pressure and then solidified quickly. Foaming was
done for pure aluminum (99.99 pct) and AlMg5 alloy not containing stabilizing particles and
AlMg5 and AlSi9Mg5 alloys containing 5 vol pct SiO 2 particles. We discuss the foaming
mechanism and develop a model for estimating the porosity that can be achieved in this …
Abstract
We developed a novel process for foaming aluminum and its alloys without using a blowing agent. The process involves a designated apparatus in which molten aluminum and its alloys are first foamed under reduced pressure and then solidified quickly. Foaming was done for pure aluminum (99.99 pct) and AlMg5 alloy not containing stabilizing particles and AlMg5 and AlSi9Mg5 alloys containing 5 vol pct SiO2 particles. We discuss the foaming mechanism and develop a model for estimating the porosity that can be achieved in this process. The nucleation of pores in foams is also discussed.
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