Irradiation evolution of Cu precipitates in Fe1.0Cu alloy studied by positron annihilation spectroscopy

被引：13
作者：
Jin, Shuoxue [1 ]
Lian, Xiangyu [1 ]
Zhu, Te [1 ,2 ]
Gong, Yihao [1 ,2 ]
Zhang, Peng [1 ]
Cao, Xingzhong [1 ]
Yu, Runsheng [1 ]
Wang, Baoyi [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst High Energy Phys, Multidiscipline Res Ctr, Beijing 100049+, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China
来源：
JOURNAL OF NUCLEAR MATERIALS | 2018年 / 499卷
基金：
中国国家自然科学基金; 北京市自然科学基金;
关键词：
Cu precipitate; CunVm complexes; Fe ion-irradiation; FeCu alloy; Positron annihilation; MODEL ALLOYS; STABILITY; ELECTRON; STEELS;
D O I：
10.1016/j.jnucmat.2017.11.011
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Fe1.0Cu alloy was irradiated by 2 MeV Fe ions to a peak dose of 0.06dpa, 0.45dpa and 1.35dpa, respectively. The irradiation evolution of Cu precipitates in Fe1.0Cu alloy was studied at various depths by positron annihilation spectroscopy. The values of the S parameters directly indicate the formation of vacancy clusters. The S-W relationship showed that CunVm complexes (n > m) dominated the microstructure in the track region. Vacancy clusters and CunVm complexes (n < m) were the main defect types in the damage region. There finding were supported by the results of the performed theoretical calculations. The coincidence Doppler broadening showed that the Cu precipitates formed easily at a low irradiation dose, and that the irradiation-induced Cu precipitation was enhanced by the increase of the irradiation dose in the track region. We showed that the Cu precipitates finally reach a steady-state morphology under multiple active processes. (C) 2017 Elsevier B.V. All rights reserved.
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收藏
页码：65 / 70
页数：6
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