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Dual-Laser PBF-LB Processing of a High-Performance Maraging Tool Steel FeNiCoMoVTiAl

Graf, Gregor; Nouri, Niki ORCID iD icon 1; Dietrich, Stefan ORCID iD icon 1; Zanger, Frederik ORCID iD icon 2; Schulze, Volker 1,2
1 Institut für Angewandte Materialien – Werkstoffkunde (IAM-WK), Karlsruher Institut für Technologie (KIT)
2 Institut für Produktionstechnik (WBK), Karlsruher Institut für Technologie (KIT)


As part of an international research project (HiPTSLAM), the development and holistic processing of high-performance tool steels for AM is a promising topic regarding the acceptance of the laser powder bed fusion (PBF-LB) technology for functionally optimized die, forming and cutting tools. In a previous work, the newly developed maraging tool steel FeNiCoMoVTiAl was qualified to be processed by laser powder bed fusion (PBF-LB) with a material density of more than 99.9% using a suitable parameter set. To exploit further optimization potential, the influence of dual-laser processing strategies on the material structure and the resulting mechanical properties was investigated. After an initial calibration procedure, the build data were modified so that both lasers could be aligned to the same scanning track with a defined offset. A variation of the laser-based post-heating parameters enabled specific in-situ modifications of the thermal gradients compared to standard single-laser scanning strategies, leading to corresponding property changes in the produced material structure. An increase in microhardness of up to 15% was thus obtained from 411 HV up to 471 HV. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000136404
Veröffentlicht am 16.08.2021
DOI: 10.3390/ma14154251
Zitationen: 11
Zitationen: 10
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Produktionstechnik (WBK)
Institut für Angewandte Materialien – Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1996-1944
KITopen-ID: 1000136404
Erschienen in Materials
Verlag MDPI
Band 14
Heft 15
Seiten Art.-Nr.: 4251
Vorab online veröffentlicht am 29.07.2021
Schlagwörter laser powder bed fusion; process development; maraging tool steel; FeNiCoMoVTiAl; Specialis; parameter studies; dual-laser PBF-LB; multi-laser PBF-LB; mechanical characterization; high hardness; functionally graded
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