Effects of He ion irradiation on the corrosion performance of alloy GH3535 welded joint in molten FLiNaK
Effects of He ion irradiation on the corrosion performance of alloy GH3535 welded joint in molten FLiNaK
复制标题
氦离子辐照对GH3535合金焊接接头在熔融FLiNaK中腐蚀性能的影响
DOI：
10.1016/j.corsci.2018.10.038
复制
发表时间：
2019
影响因子：
8.3
通讯作者：
Zhou Xingtai
中科院分区：
文献类型：
--
作者：
Liu Min;Hou Juan;Han Fenfen;Liu Renduo;Zhou Xingtai
在本研究中，研究了氦辐照对 GH3535 焊接接头腐蚀性能的影响。用 300keV He 离子照射焊接接头，并在 700°C 的 FLiNaK 熔盐中腐蚀 400h。采用SEM、EPMA和TEM对腐蚀后的显微组织进行了表征。腐蚀产生空洞并造成铬贫化。腐蚀过程中气泡形成并长大。尽管He辐照没有明显恶化腐蚀引起的Cr消耗，但He气泡和腐蚀侵蚀的综合作用对接头造成严重损坏，使气泡和/或空腔扩大成大孔。
In present study, the influence of He irradiation on the corrosion performance of a GH3535 welded joint has been investigated. A welded joint was irradiated with 300 keV He ions and corroded in FLiNaK molten salt at 700 °C for 400 h. The microstructures after corrosion were characterized by SEM, EPMA and TEM. The corrosion produced cavities and created Cr depletion. He bubbles were formed and grew during corrosion. Although He irradiation did not obviously deteriorate corrosion-induced Cr depletion, the combination effect of He bubbles and corrosion attack caused severe damage to the joint, enlarging bubbles and/or cavities into large holes.