A5090983779- Additive Manufacturing and 3D Printing Technologies
- Additive Manufacturing Materials and Processes
- High Entropy Alloys Studies
- Manufacturing Process and Optimization
- Innovations in Concrete and Construction Materials
- Bone Tissue Engineering Materials
- Welding Techniques and Residual Stresses
- Interactive and Immersive Displays
- Aluminum Alloys Composites Properties
- Metal Alloys Wear and Properties
- Advanced Materials Characterization Techniques
- Titanium Alloys Microstructure and Properties
- Advanced Welding Techniques Analysis
Graz University of Technology
2019-2023
Universidade Federal de São Carlos
2017
This study intends to contribute the state of art Fused-Filament Fabrication (FFF) short-fiber-reinforced polyamides by optimizing process parameters improve performance printed parts under uniaxial tensile loading. was performed using two different approaches: a more traditional 2k full factorial design experiments (DoE) and multiple polynomial regression an algorithm implementing machine learning (ML) principles such as train-test split cross-validation. Evaluated included extrusion...
The present work is aimed at utilizing an adapted version of the Fused-Filament Fabrication process as a means to produce hybrid joints comprised sandblasted, rolled Ti-6Al-4V substrates and additively manufactured short carbon fiber-reinforced polyamide (PA-CF). Layer height (h), printing speed (v) bed temperature (Tbed) for coating layer (i.e. initial with unreinforced polyamide) were varied. Using ultimate single-lap shear strength (ULSS) produced response, linear polynomial regressions...
Titanium alloy Ti6Al4V is the most used titanium due to its high specific strength, ductility, corrosion resistance, and weldability. Currently, this produced with a density above 99% laser welding-based additive manufacturing processes. However, costs of powder are high, for critical components, excess usually not reused. In work, we characterized additively manufactured parts by reusing single batch determine impact on morphology, chemical composition, melt pool viscosity, density,...
Fused filament fabrication (FFF) is one of the most widely used additive manufacturing processes and allows production complex parts. FFF can manufacture lightweight strong structural components when processing high-performance carbon-fiber-reinforced thermoplastics. Although process feasibility for printing 20% short-carbon-fiber reinforced PEEK was already demonstrated in literature, a systematic study addressing influence parameters on different loading conditions still lacking....
The scope of this work is to provide an overview the influences process parameters, print orientation, and post-process treatments Ti6AlV4 processed by laser powder bed fusion on its microstructure physical mechanical properties their anisotropic behavior. To avoid influence changes in quality ensure comparability, experiments were carried out using a single batch virgin powder. First, characterization density surface roughness was performed optimize parameters utilizing design experiment....
The fabrication of strong and lightweight polycarbonate AlSi10Mg aluminum alloy hybrid joints entirely through additive manufacturing was successfully demonstrated. substrate with submillimeter-sized mushroom-shaped structures on the surface were printed by laser powder bed fusion (LPBF), being subsequently hybridized PC via fused filament (FFF) using AddJoining approach. drawn metal properly filled polymer during printing, ensuring good interfacial adhesion thus providing PC/AlSi10Mg...
The repeated reuse of excess powder is an essential part the economics powder-bed additive manufacturing processes. Although many studies on selective laser melting cover topics material properties at micro- and macroscale, little known about influence multiple cycles powder. Titanium alloys, in particular, are sensitive to chemical contamination, especially presence oxygen hydrogen which can lead inferior properties. Furthermore, grain size distribution form change over time have build...
This study evaluated the manufacturing of metal–polymer hybrid parts using a 3-axis desktop Fused Filament Fabrication (FFF) printer. Two printing strategies were employed: more trivial one, consisting 3D-printing polymer directly onto metal surface, and an alternative encasing with printed polymer. Materials used Ti-6Al-4V (both rolled/sandblasted 3D-printed by laser powder bed fusion) polyamide-based polymers. Demonstrators designed to resemble omega-shaped skin stringers commonly in...
As-printed Laser-Powder Bed Fusion (LPBF) surfaces can provide anchoring spots for the infiltration of polymer printed by Fused Filament Fabrication (FFF), enhancing metal-polymer joint strength. This work evaluates influence as-printed LPBF surface roughness and FFF parameters on strength Ti-6Al-4V/PA-CF joints produced this process combination. A three-point bending testing method based ISO 14679:1997 was deployed, whereby energy dissipated interface measured. Roughness varied 3D-printing...
This study investigated the hot pressing of three distinct high entropy alloy (HEA) powder compositions, namely CrMo0.5NbTa0.5TiZr (named HEA-01), AlCrMoNbTi (HEA-02) and AlCrFeNiTi (HEA-03). The experimental design focused on varying temperature dwell time, while pressure remained constant. Density was adopted as a response, which assessed through both quantitative (using Archimedes density test with theoretical densities reference) qualitative analysis (via microstructural examination)....
Fused-filament fabrication (FFF) is an extremely popular additive manufacturing process due to its affordability, relative ease operate, and wide range of possible materials. It also notorious for the hundreds different variables, which often are overlooked in favor parameters considered be more relevant mechanical performance, such as printing bed temperatures, speed, layer height. Thus, this study aimed at evaluating some less frequently studied namely raster orientation angles (and their...
Ti 6Al 4V is the most common and well-known titanium alloy due to its lightweight, high strength, ductility, corrosion resistance, weldability. Currently, this used successfully for laser welding-based additive manufacturing processes like Laser Powder Bed Fusion (L-PBF), reaching relative densities above 99%. High density therefore minimal porosity essential meet requirements many technical applications. However, considering costs of powder production amid energy consumption, reuse excess...