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Classification of Defect Types in SLM Ti-6Al-V4 by X-ray Refraction Topography

Laquai, René and Müller, Bernd Randolf and Kasperovich, Galina and Requena, Guillermo and Haubrich, Jan and Bruno, Giovanni (2020) Classification of Defect Types in SLM Ti-6Al-V4 by X-ray Refraction Topography. Materials Performance and Characterization (MPC), 9 (1), pp. 82-93. ASTM international. DOI: 10.1520/MPC20190080 ISSN 2165-3992

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Official URL: http://www.astm.org/2020/1/


Porosity in additively manufactured materials, such as laser powder bed fusion Ti-Al6-V4, can play an important role in their mechanical performance. Not only the total porosity but also the shape/morphology of the individual pores need to be considered. Therefore, it is necessary to determine the distributions of different defect types (especially fusing defects and keyhole pores) and their dependence on process parameters. We show that synchrotron X-ray refract tion radiography allows analysis of large samples (up to several millimeters) without compromising the detectability of submicrometer defects. Correspondingly, a classification tool is introduced that is able to quantitatively distinguish defects such as keyhole pores and binding defects with a confidence level of 94 %, even when the shape cannot be discerned because of limited spatial resolution.

Item URL in elib:https://elib.dlr.de/134243/
Document Type:Article
Title:Classification of Defect Types in SLM Ti-6Al-V4 by X-ray Refraction Topography
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Laquai, RenéBundestanstalt für Materialprüfung BAMUNSPECIFIED
Müller, Bernd RandolfBundestanstalt für Materialprüfung BAMUNSPECIFIED
Kasperovich, Galinagalina.kasperovich (at) dlr.deUNSPECIFIED
Requena, GuillermoGuillermo.Requena (at) dlr.deUNSPECIFIED
Haubrich, JanJan.Haubrich (at) dlr.deUNSPECIFIED
Bruno, GiovanniBundestanstalt für Materialprüfung BAMUNSPECIFIED
Date:February 2020
Journal or Publication Title:Materials Performance and Characterization (MPC)
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1520/MPC20190080
Page Range:pp. 82-93
EditorsEmailEditor's ORCID iD
Publisher:ASTM international
Keywords:additive manufacturing, selective laser melting, X-ray refraction, microscopy, porosity, X-ray computed tomography
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Metallic Structures and Hybrid Material Systems
Deposited By: Kasperovich, Galina (Admin.), Funktional
Deposited On:13 Mar 2020 10:07
Last Modified:13 Mar 2020 10:07

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