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X-ray refraction distinguishes unprocessed powder from empty pores in selective laser melting Ti-6Al-4V

Laquai, R. and Müller, B.R. and Kasperovich, G. and Haubrich, Jan and Reguena, Guillermo and Bruno, G. (2017) X-ray refraction distinguishes unprocessed powder from empty pores in selective laser melting Ti-6Al-4V. Materials Letters, 6 (2), pp. 130-135. Elsevier. DOI: 10.1080/21663831.2017.1409288 ISBN 2166-3831 ISSN 0167-577X

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Official URL: http://www.tandfonline.com/loi/tmrl20

Abstract

For the first time, X-ray refraction techniques are proven for the identification of void formation in Ti-6Al-4V parts produced by selective laser melting. The topology and volume fraction of pores are measured in samples produced with different laser energy density. Unique X-ray refraction methods identify different kinds of defects, characteristic to the regions below and above the Optimum laser energy density, namely unprocessed powder (unmolten powder particles, balling effect, and Fusion defects) from empty keyhole pores. Furthermore, it is possible to detect small inhomogeneities (voids or cracks) with sizes below the spatial resolution of optical microscopy and X-ray computed tomography

Item URL in elib:https://elib.dlr.de/123059/
Document Type:Article
Title:X-ray refraction distinguishes unprocessed powder from empty pores in selective laser melting Ti-6Al-4V
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Laquai, R.rene.laquai (at) bam.deUNSPECIFIED
Müller, B.R.bernd.mueller (at) bam.deUNSPECIFIED
Kasperovich, G.galina.kasperovich (at) dlr.deUNSPECIFIED
Haubrich, JanJan.Haubrich (at) dlr.deUNSPECIFIED
Reguena, GuillermoGuillermo.Requena (at) dlr.deUNSPECIFIED
Bruno, G.giovanni.bruno (at) bam.deUNSPECIFIED
Date:12 December 2017
Journal or Publication Title:Materials Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:6
DOI :10.1080/21663831.2017.1409288
Page Range:pp. 130-135
Publisher:Elsevier
Series Name:MATER.RES.LETT., 2018
ISSN:0167-577X
ISBN:2166-3831
Status:Published
Keywords:Additive manufacturing; 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, Dr.-Ing. Galina
Deposited On:11 Nov 2019 18:12
Last Modified:11 Nov 2019 18:12

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