Development of a methodology for the determination of local component properties for aluminum casting materials

可时效硬化的铝硅合金适用于具有高机械要求的轻量化应用。由于对尽可能低的部件重量和恒定的机械特性的需求，对材料行为的深刻理解是必要的。铸造过程中不同的热条件会导致部件内部局部组织的不同，从而导致材料性能的不同。因此，影响热条件提供了优化组件的特殊应用的可能性，如果局部组件的性质是足够清楚的。本研究项目的目的是建立一种新的测试方法，用于快速准确地预测和验证铸造部件的局部力学性能。虽然这些特性的确定目前是通过耗时的铸造试验来进行的，但该项目追求的目标是通过减少实验工作量来实现实验表征。一个主要的创新是考虑到整个生产周期的影响变量的可能性，从凝固开始，延伸到热处理期间的时效。这种测试方法得到了微观结构模拟发展的支持。这一方面可以量化微观结构，另一方面可以更深入地了解不同微观结构的连锁效应。

Age-hardenable aluminum-silicon alloys are predestined for lightweight applications with high mechanical requirements. Due to the demand for the lowest possible component weights with constant mechanical characteristics, a profound understanding of the material behavior is necessary. Different thermal conditions in the casting process lead to different microstructures locally within a component and thus to different material properties. Therefore influencing the thermal conditions offers the possibility of optimizing components for special applications if the local component properties are sufficiently well known. The aim of this research project is to establish a new test methodology for rapid and precise prediction and validation of the local mechanical properties of cast components. While the determination of these properties is currently carried out by time-consuming casting tests, this project pursues the goal of experimental characterization with reduced experimental effort. A major innovation is the possibility of taking into account influencing variables over the entire production cycle, starting with solidification and extending to ageing during heat treatment. This test methodology is supported by the development of a microstructure simulation. This enables quantification of the microstructure on the one hand and a deeper understanding of the chain of effects of different microstructures on the other.