Fused Filament Fabrication-Based Additive Manufacturing of Commercially Pure Titanium

Thompson Y, Polzer M, Gonzalez-Gutierrez J, Kasian O, Heckl JP, Dalbauer V, Kukla C, Felfer P (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Advanced Engineering Materials Wiley

DOI: 10.1002/adem.202100380

Abstract

Fabrication of titanium components is very cost intensive, partly due to the complex machining and limited recyclability of waste material. For electrochemical applications, the excellent corrosion resistance of pure titanium is of high importance, whereas medium mechanical strength of fabricated parts is sufficient for such a use case. For smaller parts, metal fused filament fabrication (MF3) enables the fabrication of complex metallic structures densified during a final sintering step. Pure titanium can be processed to near-net-shape geometries for electrochemical applications if the parameters and the atmosphere during sintering are carefully monitored. Herein, the influence of thermal debinding and sintering parameters on the fabrication of high-density pure titanium using MF3 is investigated. Particular focus is placed on enhancing sintered density while limiting impurity uptake to conserve the high chemical purity of the initial powder material. Relative densities of 95% are repeatedly reached inside the bulk of the samples. An oxygen content of 0.56 wt% as a result of vacuum processing induces the formation of the retained α-Ti phase (925 HV0.2) inside the α matrix (295 HV0.2). Fabricated parts exhibit high mechanical strength, albeit reduced elongation due to remaining pores, and, in terms of electrochemistry, enhanced stability toward anodic dissolution.

Authors with CRIS profile

Yvonne Thompson Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Markus Polzer Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Johannes Philipp Heckl Technische Fakultät Valentin Dalbauer Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Peter Felfer Professur für Atom Probe Tomography

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Involved external institutions

Montanuniversität Leoben AT Austria (AT) Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) DE Germany (DE)

How to cite

APA:

Thompson, Y., Polzer, M., Gonzalez-Gutierrez, J., Kasian, O., Heckl, J.P., Dalbauer, V.,... Felfer, P. (2021). Fused Filament Fabrication-Based Additive Manufacturing of Commercially Pure Titanium. Advanced Engineering Materials. https://dx.doi.org/10.1002/adem.202100380

MLA:

Thompson, Yvonne, et al. "Fused Filament Fabrication-Based Additive Manufacturing of Commercially Pure Titanium." Advanced Engineering Materials (2021).

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