Effect of He Ion Irradiation on Microstructure and Properties of CLAM Steel Weld

被引：0
|
作者：
Liu D. [1 ]
Lei Y. [1 ]
Zhang W. [1 ]
Li T. [1 ]
Yao Y. [2 ]
Ding X. [2 ]
机构：
[1] School of Materials Science and Engineering, Jiangsu University, Zhenjiang
[2] China General Nuclear Power Corporation, Shenzhen
来源：
Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2022年 / 36卷 / 08期
基金：
中国国家自然科学基金;
关键词：
CLAM steel welds; ion irradiation; irradiation hardening; metallic materials; quenched and tempered treatment;
D O I：
10.11901/1005.3093.2021.451
中图分类号：
学科分类号：
摘要：
In order to explore the mechanism of the influence of ion irradiation on the microstructure and properties of as-welded and quenched and tempered welds, the welds of Low Activation Martensitic (CLAM) steel were subjected to He ion irradiation at room temperature of 70 keV. Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Continuous Stiffness Measurement (CSM) detection methods were utilized to investigate the changes in microstructure and properties of CLAM steel welds before and after ion irradiation. The results show that the size and number density of black holes on the welds' surface after irradiation increased with the rising irradiation dose; at the irradiation dose of 1×1017 ions·cm-2, the sizes of dislocation loops formed in the two welds were 18.97 nm and 15.73 nm respectively and the number densities were 2.24×1021 m-3 and 1.78×1021 m-3 respectively; the irradiation swelling rates caused by helium bubbles were 1.7% and 0.4% respectively; the radiation hardening rate caused by irradiation defects (dislocation loops and helium bubbles) were 49.0% and 29.9%, respectively. However, compared with as-welded weld, the irradiation damage of quenched and tempered weld was relatively weaker after He ion irradiation. To a certain extent, it showed that the anti-irradiation performance of the weld after quenched and tempered was improved. © 2022 Chinese Journal of Materials Research. All rights reserved.
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页码：609 / 616
页数：7
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