马氏体钢中纳米析出相的辐照稳定性研究

Martensitic steel, as one of potential candidate structural materials for future advanced nuclear devices, has been widely concerned all over the world. Based on the high and low energy ions supplied by Heavy Ion Research Facility in Lanzhou (HIRFL) and 320 kV Multi-discipline Research Platform for Highly Charged Ions, this research intends to study systematically the microstructural evolution and chemical stability of nano-scale precipitates in martensitic steels by using different experimental methods accompanied with high and low temperature irradiation facilities and a variety of analysis and testing methods. No only a comparative study will be performed on evolution of microstructure of nano-scale precipitates in martensitic steel before and after irradiation, but also, it is necessary to put microstructure observation and macro properties (positron annihilation, nano-hardness) test together. And result in trying to explore the relationship between change of size, structure, chemical composition of nano-scale precipitates and irradiation conditions. The valuable experimental data will be provided for optimization of properties and evaluation of irradiation performance of candidate structural materials in future advanced nuclear energy devices, ultimately.

马氏体钢作为未来先进核能装置潜在的候选结构材料之一，其研究一直受到广泛关注。本项目拟依托兰州重离子加速器（HIRFL）和中国科学院近代物理研究所320KV 高压综合实验平台提供的高/低能离子，利用与之配套的高/低温辐照终端和各种分析测试手段，采用不同的实验方法，系统开展辐照马氏体钢中纳米析出强化相的结构演化及化学稳定性研究。在深入了解辐照前后马氏体钢中纳米析出相微观结构和元素分布的基础上，进一步将微观结构观测与正电子湮灭、纳米硬度等宏观测试有机结合在一起，尝试探索辐照引起纳米析出相尺寸、结构、化学成分等变化与辐照条件的关联性，为未来先进核能装置候选结构材料辐照性能的评价和材料性能的优化提供有参考价值的实验数据。

马氏体钢作为未来先进核能装置潜在的候选结构材料之一，其研究一直受到广泛关注。本项目拟依托兰州重离子加速器（HIRFL）和中国科学院近代物理研究所320KV 高压综合实验平台及LEAF装置提供的高/低能离子（H、He、Fe），利用与之配套的高/低温辐照终端和各种分析测试手段，采用不同的实验方法，系统完成了辐照Fe基合金钢中纳米析出强化相的结构演化及稳定性研究，理解各种析出强化的作用，得到了纳米析出相颗粒与He气泡/空洞的交互作用。在深入了解辐照前后马氏体钢中纳米析出相微观结构和元素分布的基础上，进一步将微观结构观测与正电子湮灭、纳米硬度等宏观测试有机结合在一起，完成了辐照引起纳米析出相尺寸、结构、化学成分及辐照缺陷变化与辐照条件的关联性，为未来先进核能装置候选结构材料辐照性能的评价和材料性能的优化提供有参考价值的实验数据