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Additive manufacturing technologies for EUROFER97 components

Bonk, Simon; Neuberger, Heiko; Beckers, Daniel; Koch, Jonas; Antusch, Steffen; Rieth, Michael

Abstract (englisch):
By uncoupling the manufacturability from the design process, additive manufacturing of the baseline material EUROFER97 can open significant design freedom for divertor and breeding blankets in fusion technology. As additive manufactured components are known to possess unique microstructures compared to EUROFER97 from standard technologies, the aim of this paper is to investigate additive manufactured EUROFER97 components and the influence of post processing steps on their microstructure and mechanical properties from a materials science point of view.

This paper covers the technological fabrication process of EUROFER97 by selective laser melting (SLM), including the production of pre-alloyed EUROFER97 powder, an SLM-parameter study and the design and production of custom-build thin walled test components by SLM. In the initial state after fabrication, SLM-EUROFER97 components exhibit a bimodal, anisotropic microstructure with large ferritic grains. The fraction of ferritic grains increases with decreasing wall thickness. A heat treatment including austenitization, quenching and tempering, allows to achieve a fully martensitic, uniform microstructure for all wall thicknesses. ... mehr

DOI: 10.1016/j.jnucmat.2021.152859
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 02.2021
Sprache Englisch
Identifikator ISSN: 0022-3115
KITopen-ID: 1000129730
HGF-Programm 43.22.03 (POF IV, LK 01) Printed Materials and Systems
Erschienen in Journal of nuclear materials
Verlag Elsevier
Seiten Artiacle no: 152859
Vorab online veröffentlicht am 05.02.2021
Schlagwörter Additive manufacturing, Selective Laser Melting, 9Cr-1W-V-Ta steel, Martensite microstructure, Mechanical Properties, Size effect
Nachgewiesen in Dimensions
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