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Co-extrusion of Aluminium-Titanium-Compounds

机译：共挤出铝 - 钛 - 化合物

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The combination of different metallic materials enables the design of lightweight structures with tailor-made properties at global as well local scale and offers great potential for advanced solutions especially for the aircraft and automobile sector. Whereas titanium alloys show particular high mechanical strength and good corrosion resistance, aluminium alloys provide a considerable lower density and consequently higher potential for weight savings. However, after conventional fusion joining, e.g. after laser beam welding, heat affected zones, porosity or grain growth may occur and impair the local properties [1, 2]. In contrast, by solid-state joining techniques like co-extrusion these disadvantages can be avoided. Therefore co-extrusion exhibits an attractive solution for long products combining aluminium and titanium based alloys. Current investigations have been focused on the co-extrusion of aluminium and titanium, where titanium is the reinforcing element that is inserted in aluminium profiles. Two different billet variants were examined in the investigations, a titanium-core integrally moulded in the aluminium-billet and titanium-core inserted in a hollow drilled aluminium-billet. Experiments were made with different material combinations, A199.5 with titanium grade 2 and AlSilMgMn with Ti6A14V. Beside mechanical properties of compound the formation of bonding zone are presented.
机译：不同金属材料的组合使得轻型结构设计具有在全球范围内的量身定制的性能，对飞机和汽车领域的高级解决方案提供了极大的潜力。而钛合金展示特别高的机械强度和良好的耐腐蚀性，铝合金提供了相当大的密度，因此较高的重量储蓄潜力。然而，在传统的融合加入之后，例如激光束焊接后，热影响的地区，孔隙率或晶粒生长可能发生并损害局部特性[1,2]。相反，通过固态连接技术，如共挤出这些缺点可以避免。因此，共挤出表现出一种具有结合铝和钛合金合金的长产物的吸引性解决方案。目前的调查一直集中在铝和钛的共挤出上，其中钛是插入铝型材的增强元件。在调查中检查了两个不同的坯料变体，在铝坯中一体模型的钛芯和插入中空钻铝坯中的钛芯。用不同的材料组合，A199.5与钛等级2和具有Ti6a14V的allilmgmn进行实验。除了化合物的机械性能旁，呈现粘合区的形成。

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