In order to determine the stress state and the specific dynamic corrosion behaviors of the cooling pump impeller in the liquid lead-bismuth eutectic alloy (LBE), the numerical and the experimental investigations on the fast-flowing LBE corrosion behaviors of the SiC impeller were conducted. The distributions of stress and displacement of the SiC impeller were simulated, and then the microstructure and mechanical properties of the corroded impeller were characterized. The results indicated that the SiC impeller met the strength requirement of 1000 rpm in LBE, and the dynamic LBE corrosion had little effect upon structure safety of the SiC impeller. The maximum stresses of the SiC impeller without and with LBE loading were .452 and 9.736 MPa, respectively. The maximum displacements of the SiC impeller without and with LBE loading were 76.385 and 4.096 μm, respectively. The LBE loading reduced the axial displacement of the impeller and acted as an impeller stabilizer to some extent. Blade elongating and flapping were the main vibration mode of the SiC impeller. The mechanical properties of the SiC impellers before and after corrosion were basically the same.

中文翻译：

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SiC 泵叶轮的快速流动 LBE 腐蚀：数值和实验研究

为了确定冷却泵叶轮在液态铅铋共晶合金（LBE）中的应力状态和特定的动态腐蚀行为，对碳化硅叶轮的快流 LBE 腐蚀行为进行了数值和实验研究. 模拟了碳化硅叶轮的应力和位移分布，进而表征了腐蚀叶轮的微观组织和力学性能。结果表明，SiC叶轮在LBE中满足1000rpm的强度要求，动态LBE腐蚀对SiC叶轮的结构安全影响不大。没有和有 LBE 加载的 SiC 叶轮的最大应力分别为 0.452 和 9.736 MPa。没有和有 LBE 加载的 SiC 叶轮的最大位移分别为 76.385 和 4。分别为 096 微米。LBE加载减小了叶轮的轴向位移，并在一定程度上起到了叶轮稳定器的作用。叶片伸长和拍打是碳化硅叶轮的主要振动模式。腐蚀前后SiC叶轮的力学性能基本相同。