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Investigation of Material Properties of Wall Structures from Stainless Steel 316L Manufactured by Laser Powder Bed Fusion

Vu, Hoang Minh ; Meiniger, Steffen ; Ringel, Björn ; Hoche, Holger Claus ; Oechsner, Matthias ; Weigold, Matthias ; Schmitt, Matthias ; Schlick, Georg (2022):
Investigation of Material Properties of Wall Structures from Stainless Steel 316L Manufactured by Laser Powder Bed Fusion. (Publisher's Version)
In: Metals, 12 (2), MDPI, e-ISSN 2075-4701,
DOI: 10.26083/tuprints-00021025,
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Item Type: Article
Origin: Secondary publication DeepGreen
Status: Publisher's Version
Title: Investigation of Material Properties of Wall Structures from Stainless Steel 316L Manufactured by Laser Powder Bed Fusion
Language: English
Abstract:

To make powder bed fusion (PBF) via laser beam (-LB) for metals (/M) available for highly regulated components such as pressure equipment according to the Pressure Equipment Directive, system-specific qualification methods need to be established to deal with process- and geometry-dependent inhomogeneous material behavior. Therefore, the material properties of austenitic stainless steel (316L) and their influences on normative acceptable qualification strategies were investigated in this study. Flat tensile test specimens were produced by two manufacturing systems identical in construction and were compared to specimens produced from conventionally rolled sheet material. Specimens were compared in the horizontal and vertical building directions in relation to different slope angles, wall thicknesses and cross-sectional areas. Despite identical process setups, parameters and powder feedstock, differences in mechanical behavior could be seen. Furthermore, the mechanical properties, surface roughness and density showed dependencies on the wall thickness and slope angle. In particular, the influence of wall thickness has not been covered in publications about PBF-LB/M before. These results suggest that geometry- and system-dependent components can be designed based on associated data from qualification processes. Therefore, a new qualification method based on wall structure properties is suggested for standard qualification processes of components with wall structures, such as pressure equipment.

Journal or Publication Title: Metals
Volume of the journal: 12
Issue Number: 2
Place of Publication: Darmstadt
Publisher: MDPI
Collation: 25 Seiten
Uncontrolled Keywords: laser powder bed fusion, material properties, orientation, wall thickness, austenitic stainless steel
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 16 Department of Mechanical Engineering > Center for Engineering Materials, State Materials Testing Institute Darmstadt (MPA) Chair and Institute for Materials Technology (IfW)
16 Department of Mechanical Engineering > Institute of Production Technology and Machine Tools (PTW)
Date Deposited: 11 Apr 2022 11:26
Last Modified: 27 Oct 2022 05:49
DOI: 10.26083/tuprints-00021025
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-210255
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21025
PPN: 500771804
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