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借助于金相显微镜和扫描电镜,探讨了bcc金属中蚀坑形状和晶粒位向的关系。晶粒的位向采用扫描电镜电子通道花样技术确定,实验结果表示在单位赤面投影三角形中。采用矢量分析和坐标变换方法,推导了一组描述蚀坑形状和晶粒位向的关系式,并用理论计算数据制成图表。应用这些图表,可以迅速地确定晶粒位向。因为蚀坑形状是以方位角(θ,φ)的连续函数来描述,故晶粒位向的分析结果可直接表示在单位赤面投影三角形中,且易于确定晶界的变换矩阵。应用本文的蚀坑分析技术,曾对一些冶金问题进行了探讨。
With the aid of the metallographic microscope and scanning electron microscope, the relationship between the pit shape and grain orientation in bcc metal was discussed. The orientation of the grains was determined by scanning electron microscopy (ESA) electron-channel pattern technique. The experimental results are shown in the flat red triangles of the unit. Using vector analysis and coordinate transformation, a set of equations describing the shapes of pits and grains are deduced, and the theoretical calculation data are used to make the charts. Apply these charts to quickly determine grain orientation. Because the pit shape is described as a continuous function of azimuth (θ, φ), the analysis of the grain orientation can be directly represented in the unit red triangles and the transformation matrix of the grain boundaries can be easily determined. Using the pit analysis technique in this paper, some metallurgical problems have been discussed.