Assessment of the impact behavior of CLF-1 steel with Charpy V-notch testing and miniature Charpy V-notch testing

被引:0
作者
Shi, Zhanze [1 ]
Chen, Zhuohui [1 ]
Yu, Bintao [1 ]
Lin, Hu [1 ]
Bai, Bing [1 ]
He, Xinfu [1 ]
机构
[1] China Inst Atom Energy, Inst Reactor Engn Technol, Beijing 102413, Peoples R China
关键词
CLF-1; steel; Charpy impact test; KLST specimen; Impact property; Load-Displacement curve; SPECIMEN SIZE; STRENGTH; BRITTLE;
D O I
10.1016/j.fusengdes.2024.114692
中图分类号
TL [原子能技术]; O571 [原子核物理学];
学科分类号
0827 ; 082701 ;
摘要
China Low-activation Ferrite steel (CLF-1), as one of the structural materials developed in China for fusion reactors, is a Reduced activation Ferritic/Martensitic (RAFM) steel modeled after the traditional T91 steel (9Cr1Mo-0.2V-0.08Nb). For fusion reactor materials, the Charpy impact testing is an important method to assess their notch sensitivity. In this study, Charpy impact tests were conducted on CLF-1 steel using Charpy V-notch specimens (CVN) and Miniature Charpy V-notch specimens (Kleinstprobe, KLST) to assess the impact behavior of CLF-1 steel, and data normalization was performed on the KLST specimen. The results show that as the specimen size of CLF-1 steel decreased, the curves of impact absorbed energy, lateral expansion, and shear fracture appearance shifted towards lower temperatures, and the impact absorbed energy significantly decreased. Both the macroscopic and microscopic characteristics of the specimens obtained from the experiments indicated that KLST specimens could achieve the same fracture characteristics as CVN specimens. Additionally, at the same experimental temperature, KLST specimens exhibited a higher proportion of ductile fracture regions.
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页数:11
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