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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.1.jpg)
Figure 1. Dendrite morphology and grain orientation distribution within a freckle chain (the direction of solidification is from the bottom to the top). (A) Photograph of the turbine blade casting illustrating the presence of freckle chains (marked with black arrows).