Nuclear Materials Division, Korea Atomic Energy Research Institute, Daejeon 305-353, Korea.
Microsc Microanal. 2013 Aug;19 Suppl 5:83-8. doi: 10.1017/S1431927613012397.
Band contrast (BC) is a qualitative measure of electron back-scattered diffraction (EBSD), which is derived from the intensity of the Kikuchi bands. The BC is dependent upon several factors including scanning electron microscope measurement parameters, EBSD camera setup, and the specimen itself (lattice defect and grain orientation). In this study, the effective factors for BC variations and the feasibility of using BC variations for the quantification of microstructure evolutions have been investigated. In addition, the effects of the lattice defect and the grain orientation on the BC variations are studied. Next, a shear-deformed microstructure of 316L stainless steel, which contains nanosized grains and a large portion of twin boundaries, is revealed by BC map and histogram. Recovery and recrystallization of shear-deformed 316L stainless steel are displayed by BC variations during isothermal annealing at 700 and 800°C, respectively. It is observed that the BC turns bright as the shear-deformed crystal structure is recovered or recrystallized.
带对比度（BC）是电子背散射衍射（EBSD）的一种定性测量方法，它源于菊池线的强度。BC 取决于几个因素，包括扫描电子显微镜测量参数、EBSD 相机设置以及样品本身（晶格缺陷和晶粒取向）。在这项研究中，研究了 BC 变化的有效因素以及使用 BC 变化来定量微观结构演变的可行性。此外，还研究了晶格缺陷和晶粒取向对 BC 变化的影响。接下来，通过 BC 图谱和直方图揭示了含有纳米晶粒和大量孪晶界的 316L 不锈钢的剪切变形微观结构。在 700 和 800°C 的等温退火过程中，通过 BC 变化显示了剪切变形 316L 不锈钢的回复和再结晶。观察到随着剪切变形晶体结构的恢复或再结晶，BC 变得明亮。
