Characterisation and Optimisation of Thixoforming Feedstock Material

2006 ◽  
pp. 269-275 ◽  
Author(s):  
S. Engler ◽  
D. Hartmann ◽  
I. Niedick
Keyword(s):  
Feedstock Material

scholarly journals Design and Characterization of a Screw Extrusion Hot-End for Fused Deposition Modeling

Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 590
Author(s):  
Tim Feuerbach ◽  
Markus Thommes
Keyword(s):  
Vinyl Acetate ◽  
Fused Deposition Modeling ◽  
Ethylene Vinyl Acetate ◽  
Direct Printing ◽  
Fused Deposition ◽  
Screw Extrusion ◽  
Deposition Modeling ◽  
Feedstock Material ◽  
Material Form

The filament is the most widespread feedstock material form used for fused deposition modeling printers. Filaments must be manufactured with tight dimensional tolerances, both to be processable in the hot-end and to obtain printed objects of high quality. The ability to successfully feed the filament into the printer is also related to the mechanical properties of the filament, which are often insufficient for pharmaceutically relevant excipients. In the scope of this work, an 8 mm single screw hot-end was designed and characterized, which allows direct printing of materials from their powder form and does not require an intermediate filament. The capability of the hot-end to increase the range of applicable excipients to fused deposition modeling was demonstrated by processing and printing several excipients that are not suitable for fused deposition modeling in their filament forms, such as ethylene vinyl acetate and poly(1-vinylpyrrolidone-co-vinyl acetate). The conveying characteristic of the screw was investigated experimentally with all materials and was in agreement with an established model from literature. The complete design information, such as the screw geometry and the hot-end dimensions, is provided in this work.

scholarly journals Selection of appropriate polyoxymethylene based binder for feedstock material used in powder injection moulding

2015 ◽  
Vol 602 ◽  
pp. 012001 ◽  
Author(s):  
J Gonzalez-Gutierrez ◽  
G B Stringari ◽  
Z M Megen ◽  
P Oblak ◽  
B S von Bernstorff ◽  
...  
Keyword(s):  
Injection Moulding ◽  
Powder Injection ◽  
Powder Injection Moulding ◽  
Feedstock Material ◽  
Selection Of

scholarly journals Plasma Metal Deposition for Metallic Materials

2021 ◽  
Author(s):  
Enrique Ariza Galván ◽  
Isabel Montealegre Meléndez ◽  
Cristina Arévalo Mora ◽  
Eva María Pérez Soriano ◽  
Erich Neubauer ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Metal Deposition ◽  
Welding Parameters ◽  
Matrix Composites ◽  
Large Size ◽  
Wide Range ◽  
Direct Energy ◽  
Lightweight Alloys ◽  
Near Net Shape ◽  
Feedstock Material

Plasma metal deposition (PMD®) is a promising and economical direct energy deposition technique for metal additive manufacturing based on plasma as an energy source. This process allows the use of powder, wire, or both combined as feedstock material to create near-net-shape large size components (i.e., >1 m) with high-deposition rates (i.e., 10 kg/h). Among the already PMD® processed materials stand out high-temperature resistance nickel-based alloys, diverse steels and stainless steels commonly used in the industry, titanium alloys for the aerospace field, and lightweight alloys. Furthermore, the use of powder as feedstock also allows to produce metal matrix composites reinforced with a wide range of materials. This chapter presents the characteristics of the PMD® technology, the welding parameters affecting additive manufacturing, examples of different fabricated materials, as well as the challenges and developments of the rising PMD® technology.

Microstructure Control and Structure Analysis in the Semi-Solid State of Different Feedstock Materials for the Bearing Steel 100Cr6

2006 ◽  
Vol 116-117 ◽  
pp. 177-180 ◽  
Author(s):  
Wolfgang Püttgen ◽  
Wolfgang Bleck ◽  
B. Hallstedt ◽  
Peter J. Uggowitzer
Keyword(s):  
Solid State ◽  
Grain Growth ◽  
Dynamic Mechanical Properties ◽  
Negative Influence ◽  
Bearing Steel ◽  
Cast Material ◽  
Fine Grained ◽  
Semi Solid ◽  
Hot Rolled ◽  
Feedstock Material

The bearing steel 100Cr6 in the forged and hardened condition is of great importance in industrial use. Escaping the geometry restrictions of conventional forging, the application of semi-solid metalworking (SSM) offers significantly increased design freedom. Using conventionally available rolled feedstock material with carbide banding, however, results in a higher segregation tendency during thixoforging, and thus special attention was paid to the feedstock’s “quality”. To achieve a fine-grained, globular microstructure in the semi-solid state, castings with and without the addition of 100 ppm titanium were compared with the hot rolled material. With its inherent nitrogen Ti forms TiN particles, which reduce grain-growth in austenite. The results indicate that TiN precipitates strongly affect grain growth during solid state processing, but the grain size in the semi-solid state can only be influenced for short process times. Generally the cast feedstock materials possess smaller globulites in the semi-solid state compared to forgings, so that a reduction of the sponge effect and a minimization of the segregation in produced components are expected. Since the cast material already showed a fine-grained, globulitic microstructure, the use of TiN is not recommended because of the possible negative influence of TiN on the dynamic mechanical properties.

Wear Resistance of Laser Cladded NiCrFeSiB Self-Fluxing Composite Coatings

2016 ◽  
Vol 254 ◽  
pp. 290-295
Author(s):  
Iosif Hulka ◽  
Ion Dragoş Uţu ◽  
Viorel Aurel Şerban ◽  
Alexandru Pascu ◽  
Ionut Claudiu Roată
Keyword(s):  
Wear Resistance ◽  
Laser Cladding ◽  
Wear Behavior ◽  
Protective Coatings ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Base Material ◽  
Laser Cladding Process ◽  
Metallurgical Bond ◽  
Feedstock Material

Laser cladding process is used to obtain protective coatings using as heat source a laser. This melts the substrate and the feedstock material to create a protective coating and provides a strong metallurgical bond with minimal dilution of the base material and reduced heat affected zone. In the present study a commercial NiCrSiFeB composition was deposited by laser cladding process using different parameters onto the surface of a steel substrate. The obtained coatings were investigated in terms of microstructure, hardness and wear behavior. The experimental results revealed that the laser power had a considerable influence on the wear resistance of NiCrSiFeB coatings.

Production of Aluminium Matrix Nanocomposite Feedstock for Thixoforming by an Ultrasonic Method

2012 ◽  
Vol 504-506 ◽  
pp. 339-344 ◽  
Author(s):  
Sinan Kandemir ◽  
Anurag Yalamanchili ◽  
Helen V. Atkinson
Keyword(s):  
Mechanical Performance ◽  
Ultrasonic Method ◽  
Matrix Composites ◽  
Ultrasonic Probe ◽  
Sic Nanoparticles ◽  
Metal Matrix Nanocomposites ◽  
Particle Feeding ◽  
Matrix Nanocomposites ◽  
Feedstock Material ◽  
Matrix Nanocomposite

Metal matrix nanocomposites (MMNCs) could be strong candidates for use in the automotive and aerospace industry, where the mechanical performance is a crucial factor. This study aims to determine the feasibility of Al/SiC nanocomposite fabrication by the ultrasonic technique for the production of thixoforming feedstock material. Aluminium (A356) matrix composites were fabricated with the addition of 0.2 wt.% SiC nanoparticles using an ultrasonic method. Two different particle feeding mechanisms; the Al foil double capsulate method and the crucible placement approach, were employed. Better results were obtained for the double capsulate method. Also, Ti and Nb probe tips were tried to provide ultrasonic vibration in the melt. It has been shown that Nb is a promising ultrasonic probe tip material to produce MMNCs above 650 °C as it is thermodynamically stable in comparison with Ti.

Concept evaluation in new product development

2020 ◽  
Vol 18 (5) ◽  
pp. 1139-1151
Author(s):  
Jørgen Blindheim ◽  
Christer W. Elverum ◽  
Torgeir Welo ◽  
Martin Steinert
Keyword(s):  
Product Development ◽  
Rapid Prototyping ◽  
New Product Development ◽  
Evaluation Method ◽  
New Product ◽  
Full Scale ◽  
Original Design ◽  
Content Type ◽  
Concept Evaluation ◽  
Feedstock Material

Purpose This paper proposes the combination of rapid prototyping and physical modelling as a set-based concept evaluation method in the early stage of new product development. Design/methodology/approach The concept evaluation method is applied in a case study of a new metal additive manufacturing process for aluminium, where a set of four extruder concepts has been modelled and evaluated. Rapid prototyping was used to produce plastic models of the different designs, and plasticine feedstock material was used to physically model the metal flow during operation. Finally, the selected concept has been verified in full-scale for processing of aluminium feedstock material. Findings The proposed method led to several valuable insights on critical factors that were unknown at the outset of the development project. Overall, these insights enabled concept exploration and concept selection that led to a substantially better solution than the original design. Research limitations/implications This method can be applied for other projects where numerical approaches are not applicable or capable, and where the costs or time required for producing full-scale prototypes are high. Practical implications Employing this method can enable a more thorough exploration of the design space, allowing new solutions to be discovered. Originality/value The proposed method allows a design team to test and evaluate multiple concepts at lower cost and time than what is usually required to produce full-scale prototypes. It is, therefore, concluded to be a valuable design strategy for the early development stages of complex products or technologies.

scholarly journals A novel, precipitated polybutylene terephthalate feedstock material for powder bed fusion of polymers (PBF): Material development and initial PBF processability

2021 ◽  
Vol 197 ◽  
pp. 109265
Author(s):  
Maximilian A. Dechet ◽  
Juan S. Gómez Bonilla ◽  
Moritz Grünewald ◽  
Kevin Popp ◽  
Johannes Rudloff ◽  
...  
Keyword(s):  
Powder Bed Fusion ◽  
Polybutylene Terephthalate ◽  
Powder Bed ◽  
Material Development ◽  
Feedstock Material
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