Influence of Friction Stir Processing Parameters on the Microstructure of Aluminum Foams |
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| Authors: | Mahdi Azizieh Keyvan Goudarzi Reza Pourmansouri Hosein Kafashan Zohre Balak Hyoung Seop Kim |
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| Affiliation: | 1.Department of Materials Science and Engineering, Ahvaz Branch,Islamic Azad University,Ahvaz,Iran;2.Department of Materials Science and Engineering,Pohang University of Science and Technology (POSTECH),Pohang,South Korea |
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| Abstract: | In the present study, friction stir processing (FSP) has been used to fabricate aluminium foams. The effects of the number of FSP passes, FSP tool rotational speed, foaming time and temperature on the porosity have been investigated. Aluminium foam with porosity up to 40% was successfully fabricated. In the samples foamed at 923 K (650 °C), a few irregular pores were produced as a result of high aluminium matrix stiffness in this temperature. In general with increase in foaming temperature the porosity increased. However, in the samples foamed for 30 or 60 min, lower porosity was detected at higher foaming temperature. Also, in the samples which were produced with more FSP passes, the foaming time decreased and more uniform pore structure was obtained. |
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