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Metallographic and electron microscopic methods were used to understand the microstructural changes occurring during the additive manufacturing of components made of X40CrMoV5-1. In this hardening steel, tempering effects, which can locally be very different, occur as early as during additive manufacturing. For the determination of the micro- and macroscopic microstructural inhomogeneities, this work focused on the metallographic characterization based on macro- and micrographs as well as on hardness measurements. In addition, local inhomogeneities in the chemical composition and the microstructure were characterized by ESMA and EBSD. The examinations were accompanied by the characterization of the powder.

Metallographic Investigation of the Intrinsic Heat Treatment in the Additive Manufacturing of the Steel X40CrMoV5-1