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Influence of powder characteristics on final properties of powder-bed laser additively manufactured ods fe-14cr steel

Abstract : Additive manufacturing processes are promising technologies, currently considered as new opportunities to optimize metallic components production routes, especially in aerospace, automotive, medical and energy industries. To assess the potentialities of additive manufacturing in nuclear industry, ODS (Oxide Dispersion Strengthened) Fe-14Cr steels are produced by selective laser melting (SLM). ODS steels are studied due to their improved resistance under neutron irradiation thanks to a fine dispersion of nanosized Y-Ti-O precipitates. Such materials are produced by a first step of mechanical alloying. The resulting powder has a non-spherical shape and is coarser than powders typically used in SLM equipment. The analyzes such as composition, density, particles size distribution, flowability and morphology are performed on this powder. The milled powder is then used to produce ODS steel parts as raw material or after some modifications such as sieving. The objective of this work is to study the impact of the powder characteristics on the final material properties. As expected, powder characteristics strongly influence the final density of solidified parts. The choice of the thickness layer is also an important parameter that has to be related with the particle size distribution of the powder.
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  • HAL Id : cea-02338631, version 1

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E. Vasquez, P.-F. Giroux, F. Lomello, H. Maskrot, P. Castany. Influence of powder characteristics on final properties of powder-bed laser additively manufactured ods fe-14cr steel. MAMC 2018 - Metal Additive Manufacturing Conference : Industrial Perspectives in Additive Technologies, Nov 2018, Vienne, Austria. ⟨cea-02338631⟩

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