On Charts for Determining Crystal Orientation by Using Surface Markings (2nd Report). The Case with {100} Traces and for Combinations of the {100} and {111} Traces

For the convenience of determining orientations of crystal grains in polycrystalline specimens with cubic structure, several charts of {100} traces have been plotted in a manner similar to that for the chart of {111} traces described in the previous report. For the case of large angles between the {100} traces where considerable errors in determining the orientations, are unavoidable, an accurate determination is possible if a combination of {100} and {111} traces is used. The relations for such a combination have been calculated and plotted in the form of chart. By these charts, the crystallographic orientations of crystal grains can be determined very rapidly and accurately by observing the surface markings such as slip lines, twins or etch-pits.