【摘要】 使用连续截面法结合三维电子背散射衍射(three-dimensional electron backscatter diffraction, 3D-EBSD)方法对316L不锈钢的晶界进行三维重构，并采用平面近似度定量描述了晶界的形貌特征，从三维尺度研究了晶界工程处理对316L不锈钢晶界形貌的影响。结果表明：使用平面近似度可以区分简单平面状和复杂曲面状晶界。316L不锈钢中孪晶界与其余晶界的平面近似度均符合Gamma分布。晶界工程处理的316L不锈钢中晶界的平面近似度整体下降，表明晶界工程处理促进了更多复杂曲面状晶界的形成。更多还原

【Abstract】 Grain boundaries of 316 L stainless steel were three-dimension reconstructed by the method of serial sectioning experiment coupled with three-dimensional electron backscatter diffraction(3 D-EBSD), and the morphological characters of grain boundaries were quantitatively described by using the parameter of plane approximation, and the effect of grain boundary engineering(GBE) process on the morphological character of grain boundaries in 316 L stainless steel was studied in three-dimensional scale.The results showed that the plane approximation could be used to distinguish simple planar-and complex curved-grain boundaries. Both the plane approximations of the twin boundaries and the other grain boundaries in 316 L stainless steel conformed to the Gamma distribution. On the whole, the plane approximation of grain boundaries in 316 L stainless steel treated by GBE decreased, indicating that the GBE process promoted the formation of more complex curved grain boundaries.更多还原