日本金属学会誌

J. Japan Inst. Metals, Vol. 74, No. 9 (2010),
pp. 592-597

Fabrication of Various Types of ADC12 Aluminum Alloy Die Castings Containing Different Amount of Gases and Porous Aluminum Fabricated by Friction Stir Processing

Yoshihiko Hangai1, Hiroki Kato1, Takao Utsunomiya2, Soichiro Kitahara3, Osamu Kuwazuru4 and Nobuhiro Yoshikawa5

1Department of Mechanical System Engineering, Graduate School of Engineering, Gunma University, Kiryuu 376-8515
2Research Organization for Advanced Engineering, Shibaura Institute of Technology, Saitama 337-8570
3Gundai Co., Ltd., Isesaki 372-0854
4Department of Nuclear Power and Energy Safety Engineering, Graduate School of Engineering, University of Fukui, Fukui 910-8507
5Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505

Abstract:

Various types of ADC12 aluminum alloy die casting plates containing different amounts and types of gases were fabricated by varying the die casting conditions. Porous aluminum without the use of a blowing agent was fabricated by friction stir processing using the gases contained in the fabricated ADC12 aluminum alloy die casting plates. The effect of the amount of gases contained in the die castings on the foaming efficiency and the pore structures of obtained porous aluminum observed by X-ray CT inspection were investigated. It was shown that, although the expansion efficiency of each type of gas was not clear, the total amount of gases and porosity of obtained porous aluminum has good correlation. A porosity of approximately 60% was obtained with small area of pores and highly spherical.


(Received 2010/5/21)

Keywords:

porous metals, die casting, friction stir processing, aluminum, foam, porosity


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