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Impact of powder storage and Laser Powder Bed Fusion processing on powder characteristics of Ti-6Al-4V Grade 23

Poster presented at Virtual Congress & Exhibition MaterialsWeek 2021, online, 07.-09.09.2021
 
: Töppel, Thomas; Bittner, Florian; Köhler, Felix; Hendl, Julian; Heinze, Stefan; Marquardt, Axel

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Poster urn:nbn:de:0011-n-6403481 (2.1 MByte PDF)
MD5 Fingerprint: eb3b18a300a0b7d315eceee0ac3fc0a3
Created on: 11.9.2021


2021, 1 Folie
MaterialsWeek <2021, Online>
English
Poster, Electronic Publication
Fraunhofer IWU ()
Titan; Ti-6Al-4V ELI; Pulvereigenschaft; chemische Eigenschaft; LPBF; PBF-LB / M; SLM; LBM; Lagerung

Abstract
Ti-6Al-4V Grade 23 (extra low interstitials) is a widely used material in Laser Powder Bed Fusion (LPBF) of metals and has versatile applications in the fields of highly regulated industries like medical and aerospace. Chemical composition of this material significantly determines the mechanical properties of the additive manufactured product, which are specified in standard ASTM F3001-14. Reliable high quality of the powder during the whole time of use and the prevention of potential oxygen pickup during powder storage and processing is of critical importance for the resource efficiency of the LPBF process. In this poster presentation different aspects of powder storage and LPBF processing ofTi-6Al-4V Grade 23 are addressed. The uptake of hydrogen, nitrogen and oxygen was studied and monitored along the process chain of new and recycled powder as well as in manufactured LPBF test specimens. Gas tightness of two different commercially available LPBF powder tanks from GE Additive / Concept Laser was evaluated. Subsequently, the more suitable gas tank was equipped with a permanent measuring system to collect temperature, oxygen, and humidity data during a typical storage interval. The evolution of powder characteristics is attributed to different points of the process chain. On this basis, representative material flow and resource efficiency analysis were conducted in the form of a material balance. The presented results are part of the project AMT win, which is funded by the Free State of Saxony (Germany).

: http://publica.fraunhofer.de/documents/N-640348.html