A method to correct coordinate distortion in EBSD maps

Abstract

Drift during electron backscatter diffraction mapping leads to coordinate distortions in resulting orientation maps, which affects, in some cases significantly, the accuracy of analysis. A method, thin plate spline, is introduced and tested to correct such coordinate distortions in the maps after the electron backscatter diffraction measurements. The accuracy of the correction as well as theoretical and practical aspects of using the thin plate spline method is discussed in detail. By comparing with other correction methods, it is shown that the thin plate spline method is most efficient to correct different local distortions in the electron backscatter diffraction maps.

Accurate reconstruction of EBSD datasets by a multimodal data approach using an evolutionary algorithm

“…With regard to the recombination of multi-modal data, one first intuitive approach is to use sets of matching points over the area of interest in complementary images. Some methods aiming at correcting the distortions in EBSD maps have been implemented using this principle [15]. They require the manual selection of a set of reference and corresponding points in the BSE image and the EBSD data.…”

“…Versatility of the methodSeveral methods have been proposed in the literature, for correcting the distortions in EBSD data, using various algorithms to make up for the drift distortions. Zhang et al[15] have shown that a thin plate spline function enables compensation of the distortions in EBSD data. Contrary to most methods, the use of the CMA-ES strategy does not assume any specific shape of the distortion function, nor constrain the order of the polynomial function.…”

Boundary migration during recrystallization: experimental observations

“…One of the difficulties to combine EBSD mapping with ECC imaging is the drift problem, which typically results in non-linear spatial distortion in the EBSD maps [38]. Due to the distortion, features in the EBSD maps may not directly be registered with those in the ECC images.…”

“…Due to the distortion, features in the EBSD maps may not directly be registered with those in the ECC images. To solve this problem, a correction method, thin plate spline, has been developed to correct the spatial distortion in the EBSD maps [38]. After correction, EBSD maps can easily be fused with ECC images for quantitative analysis.…”

Influence of Nb Microaddition on Microstructure and Texture Evolution in a Fe-21Mn-1.3Al-1.5Si-0.5C TWIP Steel under Uniaxial Hot-Tensile Conditions

“…With Electron backscatter Diffraction (EBSD) individual grain orientations, local texture, and point-to-point orientation relationships can be determined routinely on the surface of bulk samples [5]. Furthermore, understanding the microstructural distribution of strain in TWIP steels is fundamental to controlling the overall deformation at the macroscale.…”