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Due to rapid solidification, additively manufactured alloys possess a very fine microstructure when compared to their cast counterparts. This results in smaller grains, finer precipitates, or even a completely different sequence of phase transformations. In order to understand the fine structure of these alloys TEM should be used complementary to optical and SEM imaging to reveal the fine features within the fine dendritic microstructure commonly found in 3D-printed metallic alloys.
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Amirkhiz et al. (2019) studied this question.
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