Mechanical properties and microstructure of a FeCrAl-ODS alloy under long-term thermal aging at 700 °C up to 10000 h

doi:10.1016/j.jallcom.2025.179627

IMR OpenIR

	Mechanical properties and microstructure of a FeCrAl-ODS alloy under long-term thermal aging at 700 °C up to 10000 h
	Li, Xinle 1,2; Zhang, Jiarong 1; Li, Yaozhi 1,2; Wang, Qitao 1,2; Li, Yanfen 1,2
通讯作者	Li, Yanfen(yfli@imr.ac.cn)
	2025-04-05
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	1021 页码:14
摘要	Long-term aging effects were studied on the FeCrAl-ODS alloy at 700 degrees C up to 10,000 h to reveal changes in mechanical properties and microstructures. The microstructure of the alloy before aging consists of fine and elongated grains, and high density of dislocations and nanoparticles. The nanoparticles have an average diameter of approximately 9 nm and a number density of 1.3 x 1023 m-3, identified as orthorhombic YAlO3 and Y2(Zr0.6Ti0.4)2O7 coherent with matrix. After aging at 700 degrees C to 10,000 h, the reduction of hardness and tensile properties at both room temperature and 700 degrees C were negligible. The total elongation tested at 700 degrees C was about 49 %, which was significantly higher than most of the ODS alloys in the literature and very beneficial for the fabrication of cladding tubes. The fracture modes of the tensile specimens remain unchanged by aging. No noticeable recovery of grain/sub-grain structures or dislocations occurs during aging. The uniform distribution, average size, number density and coherence with the matrix of nanoparticles remain almost unchanged by aging. The FeCrAl-ODS alloy exhibits superior thermal aging stability in terms of the microstructure and mechanical properties during long-term thermal aging treatment at 700 degrees C, which is promising for application in advanced nuclear energy systems.
关键词	FeCrAl-ODS alloy Thermal stability Microstructural evolution Aging Nanoparticles
资助者	LingChuang Research Project of China National Nuclear Corporation ; National Nature Science Foun-dation of China
DOI	10.1016/j.jallcom.2025.179627
收录类别	SCI
语种	英语
资助项目	LingChuang Research Project of China National Nuclear Corporation ; National Nature Science Foun-dation of China[52371126]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001444368500001
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/191974
专题	中国科学院金属研究所
通讯作者	Li, Yanfen
作者单位	1.Chinese Acad Sci, CAS Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Li, Xinle,Zhang, Jiarong,Li, Yaozhi,et al. Mechanical properties and microstructure of a FeCrAl-ODS alloy under long-term thermal aging at 700 °C up to 10000 h[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2025,1021:14.
APA	Li, Xinle,Zhang, Jiarong,Li, Yaozhi,Wang, Qitao,&Li, Yanfen.(2025).Mechanical properties and microstructure of a FeCrAl-ODS alloy under long-term thermal aging at 700 °C up to 10000 h.JOURNAL OF ALLOYS AND COMPOUNDS,1021,14.
MLA	Li, Xinle,et al."Mechanical properties and microstructure of a FeCrAl-ODS alloy under long-term thermal aging at 700 °C up to 10000 h".JOURNAL OF ALLOYS AND COMPOUNDS 1021(2025):14.