Department of Mechanical Engineering, University of Bristol, Bristol BS8 1TR, UK.
Ultramicroscopy. 2011 Apr;111(5):309-13. doi: 10.1016/j.ultramic.2011.01.013. Epub 2011 Jan 18.
Inter-granular creep cavitation damage has been observed in an ex-service 316H austenitic stainless steel thick section weldment. Focused ion beam cross-section milling combined with ion channelling contrast imaging is used to identify the cavitation damage, which is usually associated with the grain boundary carbide precipitates in this material. The results demonstrate that this technique can identify, in particular, the early stage of grain boundary creep cavitation unambiguously in materials with complex phase constituents.
在服役过的 316H 奥氏体不锈钢厚截面焊件中观察到晶间蠕变空蚀损伤。采用聚焦离子束截面铣削结合离子通道对比成像技术来识别空蚀损伤，这种损伤通常与该材料中的晶界碳化物析出物有关。结果表明，该技术能够在具有复杂相组成的材料中明确识别晶界蠕变空蚀的早期阶段。
