Authors:
Wolfgang Limberg (Helmholtz-Zentrum hereon, Germany),
Thomas Ebel (Helmholtz-Zentrum hereon, Germany)
Abstract:
In this study, Ti-6Al-4V tensile test specimens were produced by Metal Injection Moulding (MIM) using fine powder < 20 µm and 10 wt.% binder. Specimens of the same shape and size were printed by Composite Extrusion Modeling (CEM), using the same MIM-feedstock on an AIM3D-printer with modified extrusion unit. The specimens were printed with different infill directions (longitudinal and cross diagonal). Residual porosity after sintering for one hour at 1300 °C was only 1.6% for the MIM-specimens and 1.9% for the CEM-specimens. No geometrical distortion was observed during processing. X-ray tomography of the CEM-parts showed only few larger pores of less than 100 µm. The MIM- as well as the CEM-specimens achieved the same ultimate tensile strength of 945 MPa independent of the infill print direction. The plastic elongation to fracture was 15.3% for MIM, 14.5% for CEM with cross diagonal infill and 16.5% for CEM with longitudinal infill.
DOI:
https://doi.org/10.59499/WP225371969