TRR 103: From Atoms to Turbine Blades - A Scientific Approach for Developing the Next Generation of Single Crystal Superalloys

单晶镍基高温合金(SX)是现代航空发动机和发电厂燃气轮机涡轮叶片的关键材料。国际流动性和全球能源供应依赖于SX。效率和排放的提高要求在以下领域提出新的概念：(1)对合金设计和性能各方面的基本了解，(2)加工技术的不断改进和创新，(3)纳米/微结构和性能的尺度桥接表征，(4)尺度桥接材料模型和(5)研究数据的有效处理。SFB/TR103的研究活动集中在两个核心问题上：大尺度和小尺度微结构异质性(大尺度异质性：树枝晶和树枝间区域，小尺度异质性：γ/γ‘-微结构)起什么作用？合金元素(特别是：D型元素，如Re、W、..)影响显微组织、组织演变和性能？重要的是要了解这些参数如何影响热力学平衡、加工过程中组织的演变以及高温暴露和高温强度。现代合金设计力求在最有效地利用化石资源方面取得更好的性能。它还必须尊重战略要素的有限可获得性(例如，更少的稀土、更多的钨、钼等)。除了镍基高温合金外，还研究了具有γ/γ‘组织的新型钴基单晶高温合金的高温性能。在SFB/TransRegio 103，波鸿鲁尔大学(RUB)和弗里德里希-亚历山大-埃尔兰根-纽伦堡大学(FAU)联合起来，与MPIE、杜塞尔多夫、DLR、Köln和FZ Jülich合作。不同的专业领域，包括材料科学和工程、固态物理和化学、尺度桥梁材料建模和加工以及制造技术，都有着密切的科学联系。在SFB-TransRegio 103的第二个第三个资助期的研究将解决与高温合金单晶加工、高温下微结构的稳定性以及基本变形和损伤机制有关的未决问题。在第三个资助期，四个转移项目帮助将研究成果从学术界转化为应用。

Single crystal Ni-base superalloys (SX) represent key materials for turbine blades in modern gas turbines for aero engines and power plants. International mobility and global energy supply rely on SX. Improvements in efficiency and emissions demand new concepts in the areas of (i) basic understanding of all aspects of alloy design and performance, (ii) continuous improvement and innovation of processing technologies, (iii) scale bridgiung characterization of nano-/microstructures and properties, (iv) scale bridging materials modelling and (v) efficient handling of research data. The research activities of SFB/TR 103 focus on two central questions: What is the role of large and small scale microstructural heterogeneities (large scale heterogeneity: dendrites and interdendritic regions, small scale heterogeneity: γ/γ’-microstructure)? How do alloy elements (especially: d-shell elements like Re, W, ..) affect microstructure, microstructural evolution and properties? It is important to understand how these parameters affect thermodynamic equilibria, the evolution of microstructure during processing and high temperature exposure and high temperature strength. Modern alloy design strives for better performance in terms of most efficient use of fossil resources. It must also respect the limited availability of strategic elements (e.g. less Re, more W, Mo and others). In addition to Ni-base superalloys, an effort is made to explore the high temperature properties of new Co-based single crystal super alloys with γ/γ’-microstructures. In SFB/Transregio 103, the Ruhr-Universität Bochum (RUB) and the Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) join forces and collaborate with the MPIE, Düsseldorf, the DLR, Köln and the FZ Jülich. Different areas of expertise, including materials science and engineering, solid state physics and chemistry, scale bridging materials modeling and processing and manufacturing technology are in close scientific contact. Research in the second third funding period of SFB-Transregio 103 will tackles open questions related to processing of superalloy single crystals, to the stability of microstructures at high temperatures and to elementary deformation and damage mechanisms. In the third funding period, four transfer projects help to transfer research results from academia into applications.