A novel approach to the manufacturing and experimental investigation of closed-cell Al foams |
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Authors: | Sheng-Chung Tzeng Wei-Ping Ma |
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Affiliation: | (1) Department of Mechanical Engineering, Chien Kuo Technology University, Changhua, Taiwan, 500, People’s Republic of China;(2) Department of Computer Application Engineering, Lan Yang Institute of Technology, Ilan, Taiwan, 261, People’s Republic of China |
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Abstract: | This investigation proposes a modified technique for manufacturing closed-cell aluminum (Al) foams to reduce the cost of the
foaming agents during the casting and foaming processes. The addition of foaming agents promotes the uniformity of cell sizes
and controls the viscosity of the melting aluminum alloy. This work elucidates the mechanical characteristics of closed-cell
aluminum foams under compressive loading. The discussions in this paper cover the compressive stress–strain curve and the
densification strain and energy absorption effects of various specimens with various porosities. The thermal conductivity
of the aluminum foams is determined, and the results are compared with some theoretical predictions. The optimum parameters
for meeting some practical design requirements, such as impact absorption and thermal insulation design applications, are
discussed. Finally, an empirical correlation between the normalized yield strength and the relative densities is obtained. |
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