文献类型：期刊文献

英文题名：Irradiation hardening behaviors of large-scale hot rolling potassium-doped tungsten alloy under synergistic irradiations of Fe11+ ion combined with deuterium and helium plasmas

作者：Ma, Xiaolei[1]; Zhang, Xiaoxin[1]; Wang, Ting[2,3]; Lv, Wei[4]; Lang, Shaoting[5]; Ge, Changchun[1]; Yan, Qingzhi[1]

第一作者：Ma, Xiaolei

机构：[1] Institute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Xueyuan Road 30, Haidian District, Beijing, 100083, China; [2] School of Physics, Beihang University, Beijing, 100191, China; [3] Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing, 100191, China; [4] Institute for Advanced Materials, North China Electric Power University, No. 2 Beinong Road, Changping District, Beijing, 102206, China; [5] Mechanical and Electrical Engineering, Xinxiang University, Xinxiang, 453000, China

第一机构：Institute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Xueyuan Road 30, Haidian District, Beijing, 100083, China

年份：2022

卷号：30

外文期刊名：Nuclear Materials and Energy

收录：EI(收录号：20220811690042);Scopus(收录号：2-s2.0-85124869449)

语种：英文

外文关键词：Defects - Positron annihilation - Tungsten - Iron alloys - Niobium alloys - Iron - Radiation - Metal ions - Nanoindentation - Neutron irradiation - Ternary alloys - Hardness - Helium - Tungsten alloys - Deuterium - Hardening - Positron annihilation spectroscopy

摘要：In this study, a 25 kg potassium doped tungsten (KW) plate dispersed K bubbles was prepared by hot rolling firstly. In order to evaluate the mechanical properties of KW after irradiation, the synergistic irradiation of Fe11+ ion, He and D plasmas were performed on KW and pure tungsten (PW). 3.5-MeV Fe11+ ion irradiation was used to simulate displacement damage induced by neutrons. The total fluence and irradiation temperature were 5.31 × 1014 m?2 for 0.5 displacements per atom (dpa) damage and 400 K, respectively. Positron annihilation Doppler broadening spectrometry (PA-DBS) technique was applied to measure the type of defect in both undamaged and damaged PW & KW samples. The total ion fluence helium (He) and deuterium (D) were kept constant at 1 × 1025 He m?2 and 5 × 1024 D m?2, separately. Subsequently, the hardness value of PW and KW received from CSM nanoindentation technique was analyzed and compared. The results show that the increase of vacancy-type defects in KW is restrained after irradiation compared with PW. For un-irradiated PW and KW samples, there are almost the same pop-in events, which indicate that PW and KW a similar plastic deformation at room temperature. The KW shows a better irradiation hardening resistance than PW under the same irradiation condition. Besides, the evolution of irradiation hardening as well as their relationship with K bubbles were discussed in detail. ? 2022