Abstract
The proposed global HR-EBSD/TKD method is validated numerically in this chapter. Angular disorientation in the range 0 to 14° as well as equivalent elastic strains up to 5 × 10 − 2 are considered. Accuracy is evaluated in the absence and in the presence of first-order radial distortion to validate the principle of correction of optical distortion integrated in the inverse-compositional Gauss-Newton (IC-GN) algorithm. The performances of the global cross-correlation based initial guess are evaluated and discussed in the light of the convergence speed of the subsequent subpixel registration by the IC-GN algorithm. Beyond the validation of the method itself, aim is also to quantify the effects of optical distortion on accuracy, when it is neglected or approximately corrected.
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