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Time–temperature superposition for foaming kinetics of Al-alloy foams

✍ Scribed by Amkee Kim; Kazi Tunvir; Seung-Hoon Nahm; Seong-Seock Cho

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
820 KB
Volume
202
Category
Article
ISSN
0924-0136

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✦ Synopsis

Applicability of time-temperature superposition principle to the foaming kinetics of aluminum (Al)-alloy foams produced by powder metallurgical method was investigated.

Foaming kinetics above melting temperatures of Al-Si-Cu-Mg foams was studied. The expansion data at various furnace temperatures were collected. Well-known superposition parameters such as Larson-Miller, Orr-Sherby-Dorn, Goldhoff-Sherby and Manson-Succop were established based on the linear iso-expansion lines in plots of log(heating time) versus furnace temperature and log(heating time) versus inverse furnace temperature. In order to study the expansion kinetics of the Al-alloy foams, the expansions were measured in terms of pore fraction using an image analyzer. Finally, the linear relationship between the porosity and the superposition parameters was established.

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