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.

以前的超合金开发集中在改善高温性能的情况下，而无需考虑单晶组件的铸造性。在这项提交的研究赠款中，将系统地研究当今超级合金的可冷却性，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超级合金。这些将进行检查，以了解有助于实现足够的过冷的机制，以制造单晶组件和复杂的几何形状和复杂的几何形状，例如涡轮叶片的可能性。在此，诸如核定和树突的基本问题，例如在问题下的复杂多组成条件的基本问题，将在有问题的情况下进行。底层对组合物的依赖性应由统计回归，系统合金添加和通讯微观结构表征确定。临界合金元素的影响应深入研究。这项研究的结果将对超合金的发展产生重要贡献，并将有助于实现所需的机械性能的最佳组合，并为制造单晶体成分制造所需的延迟性。

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