Novel titanium-based sulfur-containing BMG for PBF-LB/M

Description & AMAZEMET association

This study explores additive manufacturing for a new glass-forming titanium-based sulfur-containing alloy, combining biocompatibility, high corrosion resistance, and strength for medical applications. Using AMAZEMET’s rePowder ultrasonic atomizer, spherical and flowable powders with a crystalline microstructure were produced, suitable for powder bed fusion processing. TEM and XRD analyses revealed amorphous microstructures in laser-treated surfaces, while SEM and EDX highlighted correlations between crystalline phase formation and melt pool dynamics, enabling the fabrication of dense bulk samples with tailored properties.

Authors

Hanna Schönrath 1 *, Jan Wegner 1 3, Maximilian Frey 2, Martin A. Schroer 3 4, Xueze Jin 5, María Teresa Pérez-Prado 6, Ralf Busch 2 and Stefan Kleszczynski 1 3

1 Chair of Manufacturing Technology, Faculty of Engineering, University of Duisburg-Essen, Lotharstr. 1, 47057, Duisburg, Germany
2 Chair of Metallic Materials, Saarland University, Campus C6.3, 66123, Saarbrücken, Germany
3 Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Carl-Benz-Straße 199, 47057, Duisburg, Germany
4 Nanoparticle Process Technology (NPPT), Faculty of Engineering, University of Duisburg-Essen, Lotharstr. 1, 47057, Duisburg, Germany
5 Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China
6 IMDEA Materials Institute, Calle Eric Kandel, 2, 28906, Getafe, Madrid, Spain

* Correspondence Email: hanna.schoenrath@uni-due.de

Abstract

This paper investigates the additive manufacturing route for a novel glass-forming titanium-based sulfur-containing alloy of the composition. This system is a promising candidate for medical devices since the lack of toxic components is combined with a high corrosion resistance and strength. Preliminary experiments and simulations show a general processability of bulk material by powder bed fusion technologies. TEM and XRD reveal an amorphous microstructure of laser-treated surfaces. Ultrasonic atomization is used to fabricate a flowable powder feed stock with spherical morphology and crystalline microstructure, which is suitable for processing in powder bed fusion. Correlations between detected crystalline phase formations and melt pool dynamics are revealed by SEM and EDX. It is shown that bulk samples with a high relative density and partially crystalline microstructure can be manufactured.
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