高温合金新型微波制备的SR-CT在线实验观测与微观机理研究

项目名称： 高温合金新型微波制备的SR-CT在线实验观测与微观机理研究

项目编号： No.11272305

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 许峰

作者单位： 中国科学技术大学

项目金额： 86万元

中文摘要： 高温合金是制备航空航天发动机的核心材料，其性能直接决定了航空航天工业的发展水平。微波热处理是一种可有效改善高温合金性能的新型快速合金制备技术。本项目通过对前期基金项目中研制的实验装置进行进一步的改进和完善，建立可定量分析微波电场和磁场作用机制的SR-CT专用合金微波制备实验系统，运用该系统对镍基、钛基等高温合金在不同电磁场参数下的微波制备过程进行无损和实时的实验观测，通过实验结果定量分析其微波制备过程的微结构演化特征。在SR-CT实验的基础上结合数值模拟方法对微波电磁场调控的合金微观演化机理进行分析，并辅以宏观力学实验测试手段研究微波电磁场参数与合金力学性能之间的关系。最终为通过合理选取微波电磁场参数来提高合金性能提供实验和理论依据。本项目对深入了解和揭示合金微波制备机理有重要的科学意义，对通过优化微波制备工艺来提高航空航天高温合金的性能有着重要的应用价值。

中文关键词： 高温合金；同步辐射CT；微波制备；微结构演化；力学性能

英文摘要： Superalloys are the key materials for the preparation of aerospace engine, which directly determines the level of development of aerospace industry. Microwave treatment is a novel and fast alloy preparation technique which can effectively improve the superalloys performance. In this project, a Synchrotron Radiation X-ray Computed Tomography (SR-CT) experimental system specially designed for the microwave preparation of alloy will be developed by the further improvement of the experimental device that has been established in the pre- fund projects.By using this system, the non-destructive and in-situ SR-CT experiment of alloys such as nickel base and titanium base alloy's microwave preparation process in the different electromagnetic field could be realized. Based on the SR-CT experimental images, the quantitative analysis of the microstructure evolution characteristics during microwave preparation can be carried out. The microstructure evolution mechanism of alloy microwave preparing process which controlled by the microwave electromagnetic parameters will be further studied by experiment-based numerical simulation.Then the relationship between the microwave electromagnetic field parameters and mechanical properties will be studied according to the assist of macroscopic mechanical experimental tests. Finally, t

英文关键词： High temperature alloy；Synchrotron radiation computed tomography；Microwave preparation；Microstructure evolution；Mechanical properties