Influence of Solidification Rate and Impurity Content on 5/7-Crossover Alloys

In view of an upcoming scrap wave and the need for products with lower carbon footprintCarbon footprint, there is an urgent need to increase the recycled fraction inWrought aluminum alloys wrought aluminum alloys. However, due to the narrow compositional limits of conventional aluminumAluminum wroughtWrought alloysAlloys and the higher impurity levels in scrap material, the applicable recyclingRecycling content is limited. Therefore, new approaches need to be identified to increase the recycled content. The introduction of the AlMgZn(Cu) Crossover alloyCrossover alloys concept may prove to be a step forward in escaping the corset of conventional alloying systems. The 5/7-Crossover alloyCrossover alloys not only overcomes the long-standing trade-off between the excellent formabilityFormability of 5xxx-series alloysAlloys and the outstanding strength of 7xxx-series alloysAlloys by combining both properties but may also tolerate a higher content of impurity elements. The scope of this study is to properly address the 5/7-Crossover alloy’sCrossover alloys sustainabilitySustainability in terms of its ability to be manufactured from secondary raw materials. AlMgZn(Cu) alloysAlloys with different tramp element concentrations were investigated.