DMREF: GOALI: Mechanistic and Microstructure-Based Design Approach for Rapid Prototyping of Superalloys

非技术综述：提高航空航天涡轮发动机用高温合金的高温强度和耐久性，将提高发动机效率，降低燃油消耗和碳排放。目前，高温合金性能的改善一直依赖于试错的合金改性，这完全不足以使材料创新跟上新发动机设计的步伐，导致不可避免地在燃油效率和排放目标上做出妥协。该奖项支持的研究将开发一种新颖而有效的方法，将合金成分、微观结构和性能联系起来，并使高温合金能够更快、更具成本效益地发展。该方法采用了高性价比、高相关性合金成分的快速成型、在基本长度尺度上进行广泛的建模以及验证实验和表征任务的创新组合。应对这些挑战将需要与项目合作伙伴GE Global Research密切互动，为项目带来实践经验和加工设施。技术总结：高温合金性能的改善依赖于试错合金改性，这不足以使材料创新跟上新发动机设计的步伐，导致性能和燃油效率目标不可避免地妥协。该奖项支持一项综合实验和计算研究，旨在提高我们对这些重要合金的基本了解，开发从原子到介观再到聚集体(多晶)水平的行为预测模型，并展示通过优化高温合金的性能而开发的建模工具的能力。该项目由一种新的快速成型方法实现，该方法将通过在GE-GRC通过铸造和锻造工艺生产一系列六组分合金，首次探索高温合金成分、微观组织、变形机制和蠕变响应的相互关联的影响。这将通过预测优化的合金成分/微结构来证明，相对于目前的商业合金具有更好的性能。应对这些挑战将需要与Goali合作伙伴GE Global Research密切互动，为该项目带来实际经验和加工设施。

Non-Technical Summary:Increasing the high temperature strength and durability of superalloys used in aerospace turbine engines will lead to enhanced engine efficiency and reduced fuel consumption and carbon emissions. Presently, improvement in superalloy performance has relied on trial-and-error alloy modification, which is utterly insufficient for materials innovation to keep pace with new engine design, leading to inevitable compromise in fuel efficiency and emissions goals. This award supports research that will develop a novel and efficient approach to connect alloy composition, microstructure and properties and enable more rapid and cost-effective superalloy advancement. The approach employs an innovative combination of cost-effective, rapid prototyping of highly relevant alloy compositions, with extensive modeling at essential length scales, and validating experiments and characterization tasks. Addressing these challenges will require close interaction with the project partner, GE Global Research, bringing practical experience and processing facilities to the project.Technical Summary:Improvement in superalloy performance has relied on trial-and-error alloy modification, which is insufficient for materials innovation to keep pace with new engine design, leading to inevitable compromise in performance and fuel efficiency goals. This award supports an integrated experimental and computational research that aims to improve our basic understanding of these important alloys, develop predictive models of behavior from atomistic through mesoscale to aggregate (polycrystalline) levels, and to demonstrate the capabilities of the modeling tools developed through optimization of superalloys for performance at high temperature. The program is enabled by a novel rapid prototyping approach that will for the first time explore the inter-related effects of superalloy composition, microstructure, deformation mechanisms and creep response by producing a series of six-component alloys via a cast and wrought process at GE-GRC. This will be demonstrated by predicting optimized alloy composition / microstructure with enhanced properties relative to a present commercial alloy. Addressing these challenges will require close interaction with the GOALI partner, GE Global Research, bringing practical experience and processing facilities to the project.