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![New vision of convection induced freckle formation theory in nickel-based superalloys by electron microscopy](https://image.oaes.cc/55fc793c-9fbd-49e6-ae42-fc848eed6345/microstructures4047.fig.2.jpg)
Figure 2. Element segregation analysis. (A) BSE image and EDS maps revealing the Ni, W, Co, Cr, Al, Ti, Hf, and Ta element distributions across the interface between the matrix and freckles. (B-E) Segregation coefficients of the matrix and freckle in 247LC-DS, GTD111-DS, René N4, and CMSX-4 alloys, respectively.