摘要
利用脉冲激光诱导击穿光谱仪(LIBS)结合SEM、EDX和维氏硬度(HV)等分析手段,分析了316L不锈钢在350℃的液态锂中静态腐蚀500h后的腐蚀特性。微观形貌分析表明:样品存在较明显的晶间腐蚀,其腐蚀层厚度约为2.7μm。硬度分析表明:腐蚀后表面硬度值约HV234.72,约是腐蚀前硬度值的0.78倍。LIBS组分分析表明:经液态锂腐蚀后的样品表面Ni、Cr等元素含量相对减少;在被腐蚀区域Li元素含量随激光击打深度的增加而减少,而Ni、Cr等元素含量与之近似呈成正比递增;母材区Li元素的渗透深度约3.5μm,约是焊缝区的0.6倍。
The corrosion behavior of 316L stainless steel in stagnating liquid lithium at 350℃ for 500h was investigated by self-designed Laser-Induced Breakdown Spectroscopy（LIBS） analysis equipment, SEM, EDX and Vickers hardness. Microstructure analysis shows that the intergranular corrosion of base metal area is obvious, and the thickness of corrosion layer is about 2.7μm. The hardness of corrosion base material surface is approximately HV234.72, which is approximately 0.78 times lower than that before corroded. LIBS analysis indicated the loss of Ni or Cr occurred in the sample during lithium corrosion, the quantity of lithium element in the corroded zone decreased with depth increasing in the sample, however, the circumstances were reverse for the nickel and chromium element. And penetration depth of liquid lithium in base metal of 316L S.S is approximately 3.5μm, which is approximately 0.6 times lower than that weld zone.
出处
《核聚变与等离子体物理》
CSCD
北大核心
2017年第3期336-341,共6页
Nuclear Fusion and Plasma Physics
基金
国家磁约束核聚变能发展研究专项(2013GB114003)
国家自然科学基金(11275135
11102221)
关键词
液态锂
316L不锈钢
静态腐蚀
LIBS
Liquid lithium
316L stainless steel
Stagnating corrosion
LIBS
