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Exploring the Correlation between Subsurface Residual Stresses and Manufacturing Parameters in Laser Powder Bed Fused Ti-6Al-4V

Mishurova, Tatiana and Artzt, Katia Juliane and Haubrich, Jan and Requena, Guillermo and Bruno, Giovanni (2019) Exploring the Correlation between Subsurface Residual Stresses and Manufacturing Parameters in Laser Powder Bed Fused Ti-6Al-4V. Metals, 9 (2), p. 261. Multidisciplinary Digital Publishing Institute (MDPI). DOI: 10.3390/met9020261 ISSN 2075-4701

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Official URL: https://www.mdpi.com/2075-4701/9/2/261

Abstract

Subsurface residual stresses (RS) were investigated in Ti-6Al-4V cuboid samples by means of X-ray synchrotron diffraction. The samples were manufactured by laser powder bed fusion (LPBF) applying different processing parameters, not commonly considered in open literature, in order to assess their influence on RS state. While investigating the effect of process parameters used for the calculation of volumetric energy density (such as laser velocity, laser power and hatch distance), we observed that an increase of energy density led to a decrease of RS, although not to the same extent for every parameter variation. Additionally, the effect of support structure, sample roughness and LPBF machine effects potentially coming from Ar flow were studied. We observed no influence of support structure on subsurface RS while the orientation with respect to Ar flow showed to have an impact on RS. We conclude recommending monitoring such parameters to improve part reliability and reproducibility.

Item URL in elib:https://elib.dlr.de/130322/
Document Type:Article
Title:Exploring the Correlation between Subsurface Residual Stresses and Manufacturing Parameters in Laser Powder Bed Fused Ti-6Al-4V
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mishurova, TatianaBAMUNSPECIFIED
Artzt, Katia JulianeKatia.Artzt (at) dlr.deUNSPECIFIED
Haubrich, JanJan.Haubrich (at) dlr.deUNSPECIFIED
Requena, GuillermoGuillermo.Requena (at) dlr.deUNSPECIFIED
Bruno, GiovanniBAMUNSPECIFIED
Date:2019
Journal or Publication Title:Metals
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:9
DOI :10.3390/met9020261
Page Range:p. 261
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
ISSN:2075-4701
Status:Published
Keywords:residual stress; synchrotron X-ray diffraction; additive manufacturing; Ti-6Al-4V
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):R - Selec ALS Druckverfahren
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Metallic Structures and Hybrid Material Systems
Deposited By: Artzt, Katia Juliane
Deposited On:14 Nov 2019 17:23
Last Modified:10 Jan 2020 13:01

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