Atomic scale structure dominated FCC and B2 responses to He ion irradiation in eutectic high-entropy alloy AlCoCrFeNi_(2.1)

作     者：Jingyu Pang Ting Xiong Wenfan Yang Hualong Ge Xiaodong Zheng Miao Song Hongwei Zhang Shijian Zheng Jingyu Pang;Ting Xiong;Wenfan Yang;Hualong Ge;Xiaodong Zheng;Miao Song;Hongwei Zhang;Shijian Zheng

作者机构：Institute of Metal ResearchChinese Academy of Sciences7Shenyang 110016China School of Material Science and EngineeringUniversity of Science and Technology of ChinaShenyang 110016China Ji Hua LaboratoryFoshan 528251China School of Nuclear Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Reliability and Intelligence of Electrical EquipmentHebei University of TechnologyTianjin 300130China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第129卷第34期

页      面：87-95页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by financial support from the National Natural Science Foundation of China(Nos.51771201 and 52071124) the Key Project of Natural Science Foundation of Tianjin(No.20JCZDJC00440) the National Key Research and Development Program(No.2018YFB0703402) the Open Research Fund from the State Key Laboratory of Rolling and Automation,Northeastern University(No.2020RALKFKT002) 

主　　题：High-entropy alloy AlCoCrFeNi_(2.1) He ion irradiation Radiation tolerance Electron microscopy 

摘      要：Radiation-tolerant materials are widely desired in nuclear reactors. High-entropy alloys(HEAs) exhibiting superior mechanical performance and swelling tolerance are being considered as next-generation nuclear structural materials. However, an understanding of HEAs irradiation tolerance at an atomic scale is still lacking. In this study, the atomic scale irradiation response of AlCoCrFeNi_(2.1), composed of face-centered cubic(FCC) phase and B2 phase, has been systematically investigated at 298 and 723 K. The bubble volume ratio of the B2 phase is much larger than that of the FCC phase under the same irradiation conditions, and hence, the FCC phase has superior swelling tolerance than the B2 phase. Also, order-disorder transformation occurred in both L12and B2 phases. The different irradiation responses between the FCC and B2 phases, depend firstly on composition and secondly on crystal structure. The higher compositional complexity and complicated atomic-level lattice environment of the FCC phase contribute to better radiation performance than B2 phase. The results pave a way for exploring radiation-tolerant structural high-entropy alloys.