Analysis of the interaction between hydrogen-based combustion systems, hightemperaturematerials and laser-based additive manufacturing (H2MAT3D)

现代氢基燃烧系统的效率在很大程度上取决于火焰-固体相互作用，因为火焰内部的热动力学场和通过固体材料的热损失都强烈影响火焰的稳定性。此外，实现新的几何复杂的燃烧器设计只能通过增材制造（AM）技术来完成。在H2MAT3D中，对氢基燃烧系统与增材制造材料之间的相互作用进行了实验和数值研究。这将允许在AM燃烧器的设计和燃烧过程中的工艺-材料相互作用之间架起桥梁。为了实现这一目标，耐高温材料也可以通过增材制造加工，特别是激光粉末床熔合（LPBF），通过基于热力学的合金选择，从镍基高温合金中分离出来，并通过极高速激光应用（EHLA）生产，从而实现高通量合金的开发。这项工作得到了微观结构模拟的支持，这将为增材制造过程中影响高温强度、降解行为和裂纹形成的信息因素提供支持。制备的样品在氢燃烧实验中进行了研究，并对其前后进行了表征，以揭示降解机制。燃烧模拟是对燃烧实验工作的补充，旨在了解材料由于导热性和表面反应对火焰的影响。在H2MAT3D中获得的基本理解将用于协调增材制造工艺条件和高温材料，以提高效率产生燃烧过程。这项研究的结果可以用于添加剂制造的燃烧系统，其中定制的合金和复杂的几何形状有助于提高效率并减少燃烧过程对环境的影响。

The efficiency of modern hydrogen-based combustion systems depends heavily on the flame-solid interactions since both the thermo-kinetic field inside the flame and the heat loss via the solid material strongly affect the flame stability. Furthermore, realization of novel geometrically complex burner designs can only be accomplished using additive manufacturing (AM) techniques. In H2MAT3D, the interaction between hydrogen-based combustion systems and additively manufactured materials is investigated experimentally and numerically. This will allow to bridge the gap between the design of AM burners and the process-material interaction in the combustion process. In order to achieve this, high-temperature resistant materials that are also processable by AM, in particular Laser Powder Bed Fusion (LPBF), are identified via thermodynamics-based alloy selection parting from Ni-base superalloys and produced via Extreme High-Speed Laser Application (EHLA), which enables a high-throughput alloy development. This work is supported by microstructure simulations that will contribute information factors influencing the high-temperature strength, degradation behavior and crack formation during additive manufacturing. The produced samples are studied in hydrogen combustion experiments and characterized pre- and post-operando to reveal degradation mechanisms. The experimental work on combustion is complemented by combustion simulations which aim to understand the influence of the material on the flame due to heat conductivity and surface reactions. The fundamental understanding gained in H2MAT3D will be used to harmonize the AM process conditions and high-temperature materials to yield combustion processes with enhanced efficiency. The results of this proposed research can be used for additive manufactured combustion systems in which tailored alloys and complex geometries help to increase the efficiency and to decrease the environmental impact of combustion processes.