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首页> 外文会议>Symposium on Cellular Metals and Polymers; 20041012-14; Furth(DE) >High-temperature-forming of aluminum foam for application in sandwich components
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High-temperature-forming of aluminum foam for application in sandwich components

机译：高温成型铝泡沫，用于三明治组件

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The present paper highlights results from the priority program "Cellular Metals" of the Deutsche Forschungsgemeinschaft (DFG SPP 1075). Aluminum foams are still a relatively new class of materials and offer a high potential for lightweight construction. Especially as core structures in sandwich materials aluminium foam benefits from their excellent properties regarding density, stiffness and energy absorption behavior. In contrast the usage of foams as a construction material is significantly limited by their low forming characteristics at ambient temperature. The implementation of a high-temperature-forming process in the region of the melting interval of the foam alloys can remove these restrictions. Reduction of yield stress and ultimate strain at high temperatures allows forming of complex shaped aluminum foam components whereas even the cover sheets can act as the forming tools. In conjunction with a suitable joining technology to apply the cover sheets, the use of cost-effective melt route aluminum foams enables manufacturing of lightweight sandwich structures for a wide range of applications. In this paper, investigations of the compression behavior of melt foamed aluminum foams under temperature load are presented. A process window for forming cellular aluminum at high temperatures in a rectangular cup tool is shown for manufacturing core structures for sandwich parts. In addition, experimental results concerning joining of the foam core and the cover sheets for manufacturing sandwich components are described.
机译：本白皮书重点介绍了德国科学基金会（DFG SPP 1075）的优先项目“蜂窝金属”的结果。泡沫铝仍然是一类相对较新的材料，并为轻质结构提供了巨大潜力。特别是作为三明治材料的芯结构，铝泡沫得益于其在密度，刚度和能量吸收性能方面的优异性能。相反，泡沫在建筑材料中的使用由于其在环境温度下的低成型特性而受到很大限制。在泡沫合金的熔化间隔的区域中实施高温形成过程可以消除这些限制。高温下屈服应力和极限应变的降低允许成型复杂形状的泡沫铝部件，而即使覆盖板也可以用作成型工具。结合合适的连接技术以应用盖板，经济高效的熔融路线铝泡沫的使用可制造出轻便的夹层结构，可用于广泛的应用。本文提出了在温度载荷下熔融泡沫铝泡沫的压缩行为的研究。示出了用于在矩形杯形工具中在高温下形成多孔铝的工艺窗口，该工艺窗口用于制造夹层零件的芯结构。另外，描述了关于泡沫芯和用于制造夹心部件的覆盖片的接合的实验结果。

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