Radiation tolerance of metallic materials strengthened by superlattice nanoprecipitates
Prof. Sui-He Jiang
University of Science and Technology Beijing

Developing structural alloys with superior radiation tolerance properties has been a persistent, and yet scientifically exciting challenge for next-generation fission and future fusion energy. In a reactor environment, collision cascades induced by neutron and/or ions may partially or fully disintegrate nanoprecipitates, and produces numerous small defects, the subsequent aggregation of which leads to typical radiation damage, such as segregation, void formation, radiation hardening and eventual failure. Our recent finding reveals an outstanding resistance to destructive damage accumulation of metallic materials under ion radiation over a range of elevated temperatures, which is due to concurrent high-density superlattice nanoprecipitates dissolving and reforming during the irradiation, a process continuously annihilates the small radiation induced defects and suppresses their development by promoting the short-range elemental reshuffling process.  

About the Speaker

蒋虽合,北京科技大学新金属材料国家重点实验室研究员,在超高强度钢、金属结构材料辐照损伤、微纳组织调控与变形损伤行为方面发表20余篇学术论文,其中包括Nature 2篇, Nature Materials 1篇。研究工作入选博士后创新人才支持计划十大创新成果(2021)。

2022-07-28 10:00 AM
Room: Tencent Meeting
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