文献类型：期刊文献

英文题名：Influence of dimensional deviation and thickness non-uniformity on the small-size specimen tensile results of CLF-1 steel

作者：Cui, Shushan[1];He, Lifeng[1];He, Xinfu[2];Zhong, Jiru[3];Long, Bin[2];Zou, Dongli[1]

机构：[1]China Acad Engn Phys, Inst Mat, Mianyang 621907, Peoples R China;[2]China Inst Atom Energy, Div Reactor Engn Technol Res, Beijing 102413, Peoples R China;[3]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：208

外文期刊名：FUSION ENGINEERING AND DESIGN

收录：;EI(收录号：20243817053941);WOS:【SCI-EXPANDED(收录号:WOS:001316322500001)】；

基金：This work was supported by the China National Key Fundamental Research Program (No. 2022YFE03120000) .

语种：英文

外文关键词：Small-size specimen; Tensile test; CLF-1 steel

摘要：Tensile testing of small-size specimens has been widely used to evaluate the influence of neutron irradiation on the mechanical properties for structural materials of fusion reactors. In recent years, researchers have been trying to standardize small-size specimen tensile test method. In the present paper, we have investigated the influence of dimensional deviation and thickness non-uniformity on the tensile results of small-size specimen by both experiments and finite element simulations, based on one of the candidate structural materials of fusion reactor, i.e. CLF-1 steel. It was found that under the conditions of small grain size, small metallurgical defect size and suitable specimen preparation, the tensile results of SS-J3 specimen could be close to the results of large-size specimen. Slightly higher yield and ultimate strengths for small specimens may be caused by the surface treatment of the wheel grinding. The repeatability of ultimate strength was better than that of yield strength, and the repeatability of elongation was worse than that of strength. For tensile tests on eight SS-J3 specimens, the maximum difference in total elongation was about 3 %. With +/- 0.1 mm deviation of thickness and parallel width, the maximum variation in total elongation was about 1.8 %. The ductility properties were sensitive to specimen's thickness non-uniformity, the measured uniform and total elongations would obviously decrease even with 0.01 mm thickness non-uniformity.