発泡アルミニウムへの繰り返し金型押込みによる波形形状付与

抄録

Aluminum foam is a difficult material to accurately form into the desired shape. Previous studies have shown that forming aluminum foam immediately after foaming, that is, before it reached a temperature below the liquidus temperature, allowed the material to flow and deform while maintaining the pore structures without collapsing. In this study, we attempted to form an aluminum foam into a wave shape by foaming a long piece of precursor and sequentially pushing a convex shape die in the longitudinal direction. The observation of pores by X-ray computed tomography (CT) imaging after shaping showed that it was possible to form an aluminum foam into a wave shape while maintaining the pore structures without generating dense areas. When a rod shape die was pushed into the aluminum foam, the shape of the previously shaped area collapsed owing to material flow. On the other hand, the use of a mountain-shaped die can prevent material flow to the previously shaped area, suggesting that a more precise shape can be achieved.