Preparation of Fe-Co-B-Si-Nb bulk metallic glasses by laser powder bed fusion: Microstructure and properties

Luo N, Scheitler CJ, Ciftci N, Galgon F, Fu Z, Uhlenwinkel V, Schmidt M, Körner C (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Materials Characterization Elsevier

Book Volume: 162

Article Number: 110206

DOI: 10.1016/j.matchar.2020.110206

Abstract

In this work, laser powder bed fusion (LPBF) was employed for the preparation of {(Fe0.6Co0.4)0.75B0.2Si0.05}96Nb4 bulk metallic glasses (BMGs). Microstructural evolution, thermal stability and mechanical properties of LPBF-processed samples using different laser power and scanning speed were systematically investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), electron probe microscopy analysis (EPMA), electron backscatter diffraction (EBSD), differential scanning calorimetry (DSC) and nanoindentation. The results show that low area energy input facilitates the formation of Fe-Co-B-Si-Nb BMGs with a large amorphous fraction. LPBF-processed sample with an area energy density of 1.25 J/mm2 (at a laser power of 60 W and a scanning speed of 600 mm/s) exhibits a nearly fully glassy microstructure with an amorphous fraction of approximately 99%, meanwhile possessing almost identical characteristic temperatures and enthalpy of crystallization as the as-atomized powder. The microstructure and mechanical properties of LPBF-processed samples are correlated with the processing parameters during LPBF. This work demonstrates that LPBF is a promising method to prepare fully amorphous Fe-Co-B-Si-Nb BMGs. The results provide key insights for the fabrication of BMGs and BMGs composites with the desired microstructure and properties by additive manufacturing.

Authors with CRIS profile

Ning Luo Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) (WTM) Christian Josef Scheitler Lehrstuhl für Photonische Technologien (LPT) Florian Galgon Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) (WTM) Zongwen Fu Zentralinstitut für Neue Materialien und Prozesstechnik Michael Schmidt Lehrstuhl für Photonische Technologien (LPT) Carolin Körner Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) (WTM)

Involved external institutions

Leibniz-Institut für Werkstofforientierte Technologien (IWT) DE Germany (DE)

How to cite

APA:

Luo, N., Scheitler, C.J., Ciftci, N., Galgon, F., Fu, Z., Uhlenwinkel, V.,... Körner, C. (2020). Preparation of Fe-Co-B-Si-Nb bulk metallic glasses by laser powder bed fusion: Microstructure and properties. Materials Characterization, 162. https://doi.org/10.1016/j.matchar.2020.110206

MLA:

Luo, Ning, et al. "Preparation of Fe-Co-B-Si-Nb bulk metallic glasses by laser powder bed fusion: Microstructure and properties." Materials Characterization 162 (2020).

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