3D Printing – TechConnect Briefs

Robotic Deposition to Enable Multi-Axis Material Extrusion

Kubalak J.R., Williams C.B., Virginia Tech, US

The material extrusion (ME) additive manufacturing process is extensively used in hobbyist and prototyping applications, but it is not always suitable for the fabrication of end-use components. The thermal characteristics of the layer-by-layer deposition results [...]

High power electron gun for metal additive manufacturing based on superconducting technology

Thangaraj J., Fermi National Accelerator Laboratory, US

E-beam additive manufacturing is a rapidly growing industry. Electron guns capable of reaching higher energies and higher average power can enable larger melt pools, higher production speed, and permit broader range of materials for metal [...]

The impact of the “4d-Rheoprinting” additive manufacturing technique on molecular orientation and thermal properties of polymeric parts

Duhduh A., Coulter J.P., Lehigh University, US

This paper discusses a novel additive manufacturing technique that was developed in order to 3D print polymeric parts with tunable properties. This technique, known as 4D-Rheoprinting, can be applied to a number of common additive [...]

3D-printed Optical Devices with Refractive Index Control for Microwave Applications

Isakov D., Wu Y., Allen B., Stevens C.J., Grant P.S., University of Warwick, UK

Achieving sub-wavelength spatial variations in the relative permittivity εr and permeability μr to control the propagation of the electromagnetic radiation opens up many opportunities for the development of new devices with improved or novel functionality [...]

Towards 3D Printing of Any Alloy

Eckel Z., HRL Laboratories, US

Towards 3D Printing of Any Alloy Authors: Zak C. Eckel [1], John H. Martin [1], William B. Carter [1], Tobias A. Schaedler [1], Brennan D. Yahata [1], Justin A. Mayer [1], Jacob M. Hundley [1] [...]

Optimized internal geometries for lightweighting and multifunctionality in additive manufacturing – an ideal processing target

Berger J., Nama Development LLC, US

One of the great opportunities in additive manufacturing is the ability to manufacture complex optimized internal geometries such as lattices and honeycombs for space filling applications. Some obvious applications including sandwich panels for lightweighting and [...]

Mechanical Properties of 3D Printed PLA Specimens with Various Infill Shapes and Volumes

Subeshan B., Rahman M.M., Asmatulu E., Arifa K., Wichita State University, US

Traditional manufacturing methods contain removing excess materials by trimming, cutting and sanding to get the projected shapes; however, additive manufacturing contain direct manufacturing of the objects utilizing computer assisted design model by adding a layer [...]

Development and property modification of composite metal for Material extrusion printed circuit

Dang H.W., Koo B.J., Lee C.W., Yang Y.-S., Electronics and Telecommunications Research Institute, KR

Recently, the proportion of 3D printing technology in the electronics industry is expected to average 50% in 2030. It is expected that the 3D printing manufacturing method will be introduced in earnest depending on the [...]

RF passive structures via low temperature direct ink writing of annealing-free composite alloy

Koo B., Dang H.W., Yang Y.-S., ETRI, KR

Recent advances in the field of additive manufacturing have utilized electronic circuits to develop high-valued functional devices. Here we present a novel approach to fabricate viscoelastic polymer-free metal ink and RF passive structures via material-extruded [...]

Magnetohydrodynamic Drop-on-Demand Droplet Formation and Coalescence

Sukhotskiy V., Karampelas I.H., Vishnoi P., Vader S., Vader Z., Vader S., Vader Z., Amiri Roodan V., Verma A., Garg G., Furlani E.P., University at Buffalo, US

In recent years there has been a meteoric rise in interest and research in the field of metal additive manufacturing in both academia and industry. Such processes represent an attractive alternative to more traditional metal [...]

Numerical Simulation of Extrusion Additive Manufacturing: Fused Deposition Modeling

Verma A., Sukhotskiy V., Vishnoi V. Amiri Roodan P., Furlani E.P., University at Buffalo, US

We demonstrate a 3D computational fluid dynamic (CFD) simulation of the Fused Deposition Modeling (FDM) process. Extrusion-based additive manufacturing technologies, such as FDM, are advancing rapidly as applications of rapid prototyping for finished product development [...]

Tolerances Consideration in 3D Printing

Williams J., Wade A., Frostburg State University, US

The additive manufacturing laboratory at Frostburg State University utilizes three different 3D printers, studied and leaned the error in tolerance, and develop a method to approach parts with minimal tolerance error, and successfully produce the [...]

Mechanical reliability of fused deposition modeled polymers and composites

Keles O., Anderson E.H., San Jose State University, US

Fused deposition modeling (FDM) is the most common additive manufacturing technique for the production of cost effective polymers and composites. In fact, half million FDM systems were sold between 2013 and 2015. FDM is used [...]

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