Undercooling of superalloys and casting quality of single-crystal turbine blades

高温合金过冷与单晶涡轮叶片铸造质量

• 批准号: 229777280
• 负责人: Professor Dr.-Ing. Andreas Bührig-Polaczek
• 金额: --
• 依托单位: Gießerei-Institut (GI)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/229777280?language=en
• 关键词: Undercooling; superalloys; casting; quality; single

Previous superalloy development focussed on the improvement of high temperature properties without considering the castability of single-crystal components. In this submitted research grant the undercoolability of today's superalloys will be systematically researched in order to investigate their susceptibility to casting defects. The focus of this project is on the latest 4th generation superalloys. These will be examined in order to find out about mechanisms contributing to the achievement of a sufficient undercooling to make the manufacturing of single-crystal components and complex geometries like turbine blades possible.Here, fundamental scientific questions such as the nucleation and dendrite growth of complex multicomponent alloys under problematic conditions will be at the forefront of our research. The dependency of the undercooling on the composition shall be determined by statistic regression, systematic alloying addition and correspondent microstructure characterisation. The impact of critical alloying elements shall be investigated in depth.The results of this study will form an important contribution to the development of superalloys and will help to achieve an optimal combination of the desired mechanical properties with the required castability for the manufacturing of single-crystal components.

以往高温合金的发展主要集中在提高高温性能上，而没有考虑单晶成分的浇注性。在本次提交的研究经费中，将系统地研究当今高温合金的过冷性，以调查其对铸造缺陷的敏感性。该项目的重点是最新的第四代高温合金。这些将被检查，以找出有助于实现充分过冷的机制，使制造单晶部件和复杂的几何形状，如涡轮叶片成为可能。在这里，复杂的多组分合金在问题条件下的成核和枝晶生长等基础科学问题将是我们研究的前沿。过冷度对成分的依赖性应通过统计回归、系统的合金添加和相应的显微组织表征来确定。应深入研究关键合金元素的影响。这项研究的结果将对高温合金的发展做出重要贡献，并将有助于实现所需的机械性能与制造单晶部件所需的浇注性的最佳组合。

项目成果

Investigation of the Undercoolability of Ni-Based Alloys Using High Temperature Thermal Analysis

• DOI: 10.3390/met5041971
• 发表时间: 2015-12-01
• 期刊: METALS
• 影响因子: 2.9
• 作者: Bogner, Samuel;Ivanova, Elvira;Buehrig-Polaczek, Andreas
• 通讯作者: Buehrig-Polaczek, Andreas

Effect of local cooling rates on the microstructures of single crystal CMSX-6 superalloy: A comparative assessment of the Bridgman and the downward directional solidification processes

• DOI: 10.1016/j.jallcom.2014.07.084
• 发表时间: 2014-12-15
• 期刊: JOURNAL OF ALLOYS AND COMPOUNDS
• 影响因子: 6.2
• 作者: Wang, Fu;Ma, Dexin;Buehrig-Polaczek, Andreas
• 通讯作者: Buehrig-Polaczek, Andreas