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

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          Abstract

          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. The results of the investigation can be used to derive cross-material optimization potential to produce functionally graded high-performance components on PBF-LB systems with synchronized multi-laser technology.

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          Additive manufacturing of metals

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            The manufacturing of hard tools from metallic powders by selective laser melting

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              Steels in additive manufacturing: A review of their microstructure and properties

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                Author and article information

                Contributors
                Role: Academic Editor
                Journal
                Materials (Basel)
                Materials (Basel)
                materials
                Materials
                MDPI
                1996-1944
                29 July 2021
                August 2021
                : 14
                : 15
                : 4251
                Affiliations
                [1 ]Rosswag GmbH, 76327 Pfinztal, Germany
                [2 ]Institute for Applied Materials-Materials Science and Engineering (IAM-WK), Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany; niki.nouri@ 123456kit.edu (N.N.); stefan.dietrich@ 123456kit.edu (S.D.); volker.schulze@ 123456kit.edu (V.S.)
                [3 ]wbk Institute of Production Science, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany; frederik.zanger@ 123456kit.edu
                Author notes
                [* ]Correspondence: g.graf@ 123456rosswag-engineering.de ; Tel.: +49-7240-9410-292
                Author information
                https://orcid.org/0000-0002-9885-7883
                https://orcid.org/0000-0002-2955-4125
                https://orcid.org/0000-0003-4500-3005
                https://orcid.org/0000-0003-2428-4127
                Article
                materials-14-04251
                10.3390/ma14154251
                8348207
                34361445
                752aaf6e-cd51-4d94-be3d-57d5f3753360
                © 2021 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( https://creativecommons.org/licenses/by/4.0/).

                History
                : 30 June 2021
                : 27 July 2021
                Categories
                Article

                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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