Cavitation erosion behavior of CLAM steel weld joint in liquid lead-bismuth eutectic alloy

IF 3.1 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING
Yu-cheng Lei , Xiao-kai Guo , Hong-xia Chang , Tian-qing Li , Qiang Zhu , Gang Chen , Long-ren Xiao
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引用次数: 7

Abstract

The cavitation erosion of weld joint and base metal of China low activation martensitic (CLAM) steel in liquid lead-bismuth eutectic alloy (LBE) at 550 °C was investigated to simulate the cavitation erosion of the first wall and the nuclear main pump impeller in the accelerator driven sub-critical system (ADS). A suit of ultrasonic cavitation facility was self-designed to study the cavitation erosion. By studying the surface micro topography, roughness and mean pit depth of the tested specimens, it was found that some crater clusters and large scale cracks appeared on the tested specimen surface after the formation of numerous single craters, and the base metal exhibited much better cavitation erosion resistance than the weld bead due to the difference in their mechanical properties and microstructures. In addition, by comparing the results of static corrosion and cavitation erosion, it could be concluded that the cavitation erosion and the dissolution and oxidation corrosion in liquid LBE would accelerate mutually.

液态铅铋共晶合金CLAM钢焊缝的空化侵蚀行为
研究了中国低活化马氏体(CLAM)钢在液态铅铋共晶合金(LBE)中焊接接头和母材在550℃时的空蚀现象,以模拟加速器驱动亚临界系统(ADS)中第一壁和核主泵叶轮的空蚀现象。自行设计了一套超声空化装置,对空化侵蚀进行了研究。通过对试样表面微观形貌、粗糙度和平均坑深的研究,发现试样表面在形成大量的单坑后出现了一些坑簇和大规模裂纹,由于母材的力学性能和显微组织的差异,母材的抗空泡侵蚀性能明显优于焊缝。另外,通过对比静态腐蚀和空化腐蚀的结果,可以得出空化腐蚀与液态LBE的溶解和氧化腐蚀相互加速的结论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
4.30
自引率
0.00%
发文量
2879
审稿时长
3.0 months
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