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The Effect of Thickening Agent on Foaming and Mechanical Properties of A356 Alloy  

Tak, Byeong-Su (i-cube center, ERI, ReCAPT, School of Nano and Advanced Materials Engineering, Gyeongsang National University)
Kim, Byeong-Gu (i-cube center, ERI, ReCAPT, School of Nano and Advanced Materials Engineering, Gyeongsang National University)
Jeong, Seung-Reung (i-cube center, ERI, ReCAPT, School of Nano and Advanced Materials Engineering, Gyeongsang National University)
Hur, Bo-Young (i-cube center, ERI, ReCAPT, School of Nano and Advanced Materials Engineering, Gyeongsang National University)
Publication Information
Journal of Korea Foundry Society / v.30, no.6, 2010 , pp. 241-246 More about this Journal
Abstract
The viscosity of foam metal is necessary to get the pores, but it is difficult to manufacture net-shape foam, because the fluidity decreases by increasing viscosity. In this study, the A356 alloy which has good fluidity and less defect was selected and fabricated to foam metal. To understand about effect of thickening agent on foaming and mechanical properties, quantity of thickening agent was changed. The pore size, porosity and distribution of foam metal were measured by i-solution program. And compression test were performed by UTM. In case of 3.0wt% Ca in thickening agent, it is found that most of foam consist of homogeneous shape, and the growth height had the highest value of 204 mm in the all fabricated foams. The porosity was 93% and compressive strength was 3.1 MPa. In the microstructure, the $Al_2Si_2Ca$ intermetallic compound and Ti were observed. The vickers hardness value rose with increasing viscosity value.
Keywords
A356 alloy foam; Thickening agent; Viscosity; Foaming properties; Compressive properties;
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