熔盐堆用镍基合金失效机理与改性策略研究进展

王优, 陈向阳, 王煦嘉, 汤春桃, 沈朝, 曾小勤

Progress in Failure Mechanisms and Modification Strategies of Nickel-Based Alloys for Molten Salt Reactors

WANG You, CHEN Xiangyang, WANG Xujia, TANG Chuntao, SHEN Zhao, ZENG Xiaoqin

图7 晶界工程(GBE)调控前后样品晶界变化[25]，不同晶界上二次碳化物的析出形貌[25]，及GBE调控后GH3535合金的腐蚀失重及力学性能变化[70]

Fig.7 Grain boundary evolution before (a1) and after (a2) grain boundary engineering (GBE) treatment[25] (CSL—coincidence site lattice); SEM images and in situ orientation image microscopy (OIM) maps (insets) showing secondary carbide precipitation at random (R) grain boundaries (b1), Σ3 grain boundaries (b2), and Σ9 grain boundaries (b3)[25]; corrosion mass loss (c1) and high-temperature stress-strain curves of GH3535 alloy after corrosion in molten 45LiCl-55KCl salt for 300 h in the solid-solution state (c2) and GBE-treated state (c3)[70]