Production of polycrystalline superalloy membranes by cross-linking of incoherent g´-precipitates

本研究计划的目的是探索一种生产高温合金膜的新工艺。它是基于非共格而非共格g′-析出物的粗化，导致双连续g/g′-微观结构。这种新方法不仅有可能简化生产过程，而且还可以提高膜材料的强度。然而，工艺参数、微观结构演变与膜性能之间的关系尚不清楚。因此，研究建议的目的是澄清这种相互关系。只有这样，才有可能充分利用新的生产工艺，制造出具有最佳性能的膜。我们将特别关注通过非相干g′-颗粒的生长产生双连续g/g′-微观结构所需的加工步骤，以及所得膜的机械性能。

The objective of this research proposal is to investigate a new process for the production of superalloy membranes. It is based on the coarsening of incoherent rather than coherent g´-precipitates, leading to a bi-continuous g/g´-microstructure. This new method has not only the potential to simplify the production process but also to raise the strength of the membrane material. However, the correlation between processing parameters, microstructure evolution and membrane properties are not yet understood. Therefore, it is the purpose of the research proposal to clarify this interrelation. Only then is it possible to make full use of the new production process and fabricate membranes with optimal properties. Particular attention will be placed on the processing step required to produce a bi-continuous g/g´-microstructure via growth of incoherent g´-particles as well as the mechanical properties of the resulting membranes.