Printing of Microscale Nanotwinned Copper Interconnections Using Localized Pulsed Electrodeposition (L-PED)

2018 ◽  
Author(s):  
Ali Behroozfar ◽  
Soheil Daryadel ◽  
S. Reza Morsali ◽  
Rodrigo A. Bernal ◽  
Majid Minary-Jolandan
Keyword(s):  
Mechanical Properties ◽  
Electrical Resistivity ◽  
Additive Manufacturing ◽  
High Resistance ◽  
Environmental Conditions ◽  
Coarse Grained ◽  
Post Processing ◽  
Manufacturing Technique ◽  
Conductive Substrate ◽  
Pulsed Electrodeposition

Nanotwinned (nt) metals exhibit superior electrical and mechanical properties compared to their coarse-grained and nano-grained counterparts. They have a unique microstructure with grains that contain layered nanoscale twins divided by coherent twin boundaries (TBs). Since nanotwinned metals have low electrical resistivity and high resistance to electromigration, they are ideal materials for making nanowires, interconnections and switches. In this paper we show the possibility of making nanotwinned copper interconnections on a non-conductive substrate using a novel additive manufacturing technique called L-PED. Through this approach, microscale interconnections can be directly printed on the substrate in environmental conditions and without post processing.

Fracture Mechanisms in High-Cycle Fatigue of Selective Laser Melted Ti-6Al-4V

2014 ◽  
Vol 627 ◽  
pp. 125-128 ◽  
Author(s):  
Marco Simonelli ◽  
Y.Y. Tse ◽  
C. Tuck
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Selective Laser Melting ◽  
High Cycle Fatigue ◽  
Fatigue Performance ◽  
Fracture Mechanisms ◽  
Cycle Fatigue ◽  
Laser Melting ◽  
Manufacturing Technique ◽  
Metal Additive

Selective laser melting (SLM) is an attractive metal additive manufacturing technique that can create functional finished components. The microstructure that originates from SLM, however, differs in many aspects from that obtained from conventional manufacturing. In addition, the microstructure-mechanical properties relationship is not yet fully understood. In this research, the high-cycle fatigue performance of SLM Ti-6Al-4V was studied. The dominant fracture mechanisms were reported and discussed in relation to the microstructure of the specimens.

scholarly journals Novel hybrid method to additively manufacture denser graphite structures using Binder Jetting

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Vladimir Popov ◽  
Alexander Fleisher ◽  
Gary Muller-Kamskii ◽  
Andrei Shishkin ◽  
Alexander Katz-Demyanetz ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Hybrid Method ◽  
Industrial Applications ◽  
Cold Isostatic Pressing ◽  
Post Processing ◽  
Hybrid Processes ◽  
Binder Jetting ◽  
Two Hybrid ◽  
Characterisation Methods

AbstractThis study introduces two hybrid processes integrating an additive manufacturing technique with post-processing treatments namely (i) Binder Jetting Printing (BJP) + Cold Isostatic Pressing (CIP) + cycle and (ii) BJP + cycle where cycle refers to a sequence of Impregnation—Drying—Pyrolysis. These two new processes yielded additively manufactured parts with higher density and reduced defects/porosities. As a testbed, we used these new processes to fabricate graphite structures. The samples produced by both methods were compared with each other and benchmarked to the samples produced by (a) BJP alone and (b) Traditional uniaxial pressing like compaction moulding. Various characterisation methods were used to investigate the microstructure and mechanical properties which showed that the porosity of hybrid manufactured samples reduces from 55% to a record 7%. This technological pathway is expected to create a new avalanche of industrial applications that are hitherto unexplored in the arena of hybrid additive manufacturing with BJP method.

scholarly journals Effects of Polypropylene Fibers on the Mechanical Performance of a 3D Printable Mix

2021 ◽  
Vol 10 (8) ◽  
pp. 43-46
Author(s):  
Ankit Pal ◽  
A.K. Jain
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Additive Manufacturing ◽  
Industrial Revolution ◽  
Mechanical Performance ◽  
Polypropylene Fibers ◽  
Construction Sector ◽  
Construction Work ◽  
Fourth Industrial Revolution ◽  
Manufacturing Technique

Application of automation in construction work has now become need of the hour. Automation in construction work can be done by implementing a technique known as additive manufacturing technique. Use of additive manufacturing in construction sector has the potential to bring fourth industrial revolution by using 3D concrete printers. This paper is based ona parametric experimental study to evaluate the effect of Polypropylene (PP) fibers on mechanical properties of a 3D printable concrete. PP fibers were used invaryingpercentage ratio of 0.02, 0.04, 0.08, 0.12 and 0.16 of binder at constant W/B ratio.

Anisotropic Material Behaviors of 3D Printed Carbon-Fiber Polymer Composites With Open-Source Printers

2021 ◽  
Author(s):  
Jordan Garcia ◽  
Robert Harper ◽  
Y. Charles Lu
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Carbon Fiber ◽  
3D Printing ◽  
Open Source ◽  
Polymer Composites ◽  
Mechanical Responses ◽  
Manufacturing Technique ◽  
3D Printed ◽  
Traditional Manufacturing

Abstract Composite products are often created using traditional manufacturing methods such as compression or injection molding. Recently, additive manufacturing (3D printing) techniques have been used for fabricating composites. 3D printing is the process of producing three-dimensional parts through the successive combination of various layers of material. This layering effect in combination with exposure to ambient (or reduced) temperature and pressure cause the finished products to have inconsistent microstructures. The inconsistent microstructures along with the oriented reinforcing fibers create anisotropic parts with difficulty to predict mechanical properties. In this paper, the mechanical properties of fiber reinforced polymer composites produced by additive manufacturing technique (3D printing) and by traditional manufacturing technique (compression molding) were investigated. Three open-source 3D printers, i.e. FlashForge Dreamer, Tevo Tornado, and Prusa i3 Mk3, were used to fabricate bending samples from carbon-fiber reinforced ABS (acrylonitrile butadiene styrene). Results showed that there exist significant discrepancies and anisotropies in mechanical properties of 3D printed composites. First, the properties vary greatly among parts made from different printers. Secondly, the mechanical responses of 3D printed parts strongly depend upon the orientations of the filaments. Parts with the infill oriented along the length of the specimens showed the most favorable mechanical responses such as Young’s modulus, maximum strength, and toughness. Thirdly, all 3D printed parts exhibit inferior properties to those made by conventional manufacturing. Finally, theoretical modeling has been attempted to predict the mechanical responses of 3D printed products and can potentially be used to “design” the 3D printing processes to achieve the optimal performance.

A Novel Multimaterial Additive Manufacturing Technique for Fabricating Laminated Polymer Nanocomposite Structures

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Clayson C. Spackman ◽  
Kyle C. Picha ◽  
Garrett J. Gross ◽  
James F. Nowak ◽  
Philip J. Smith ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Dimensional Accuracy ◽  
Polymer Nanocomposite ◽  
Underlying Mechanism ◽  
Electrospinning Process ◽  
Fiber Mats ◽  
Uv Curable ◽  
Manufacturing Technique ◽  
Nanocomposite Structures

The objective of this research is to develop a novel, multimaterial additive manufacturing technique for fabricating laminated polymer nanocomposite structures that have characteristic length-scales in the tens of millimeters range. The three-dimensional (3D) printing technology presented in this paper combines the conventional inkjet-based printing of ultraviolet (UV) curable polymers with the deposition of either aligned or random nanoscale fiber mats, in between each printed layer. The fibers are first generated using an electrospinning process that produces the roll of fibers. These fibers are then transferred to the part being manufactured using a stamping operation. The process has been proven to manufacture multimaterial laminated nanocomposites having different 3D geometries. The dimensional accuracy of the parts is seen to be a function of the interaction between the different UV-curable polymer inks. In general, the addition of the nanofibers in the form of laminates is seen to improve the mechanical properties of the material, with the Young’s modulus and the ultimate breaking stress showing the most improvement. The pinning and deflection of microcracks by the nanoscale fiber mats has been identified to be the underlying mechanism responsible for these improved mechanical properties. The thermogravimetric analysis (TGA) reveals that these improvements in the mechanical properties are obtained without drastically altering the thermal degradation pattern of the base polymer.

scholarly journals Investigations on the Mechanical Properties of Natural Fiber Granulated Composite Using Hybrid Additive Manufacturing: A Novel Approach

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
R. Anandkumar ◽  
S. Ramesh Babu ◽  
Ravishankar Sathyamurthy
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Natural Fiber ◽  
Volume Fraction ◽  
Layer By Layer ◽  
Manufacturing Technique ◽  
Number Of Layers ◽  
Novel Approach ◽  
Deposition Modeling ◽  
Powdered Form

In this work, experiments on mechanical properties such as tensile, flexural, effects, and stiffness testing are performed on natural fiber granulated composites (NFGC) manufactured using a hybrid additive manufacturing technique. The natural fiber granulated composites are prepared using the powdered form of sugarcane, jute, ramie, banana, pineapple fiber, and seashell powder with a volume fraction of 0.8. In the hybrid additive manufacturing technique, the fused deposited modeling (FDM) machine is modified by combining with the shape deposition modeling (SDM) to print the specimens layer by layer, and the influence of the number of layers on the mechanical properties is analyzed. The results concluded that increasing the number of layers from 6 to 12 improved the mechanical properties such as tensile strength, flexural strength, impact strength, and hardness values by 40.84, 50.04, 21.55, and 20.55%, respectively. Further, a novel technique can be utilized for developing the composites in replacement with conventional methods.

scholarly journals Study of the Microstructure and Mechanical Properties Obtained by Laser Boost in SLM Process for the Ti-64 Alloy

2021 ◽  
Vol 1016 ◽  
pp. 1611-1617
Author(s):  
Caroline Widomski ◽  
Denis Solas ◽  
François Brisset ◽  
Anne Laure Helbert ◽  
Thierry Baudin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Selective Laser Melting ◽  
Maximum Strength ◽  
Post Processing ◽  
Laser Melting ◽  
Melting Area ◽  
Microstructure And Mechanical Properties ◽  
Manufacturing Techniques ◽  
Complex Parts

Selective laser melting (SLM) is one of the new additive manufacturing techniques in which complex parts can be created directly by selectively melting layers of powder. If the productivity of the process is too fast, defects (porosity, partially melted powder, spatters …) are generated inside the fabricated parts and can deteriorate the mechanical properties of the product. A new Laser Boost strategy with a larger melting area and a productivity of 43.20 cm3/h has been compared to a Linear Classic strategy. Ti-64 alloy samples were elaborated with both strategies to study their influence on microstructure and mechanical properties. Laser Boost strategy leads to the formation of Ti-64 prior β grains that are larger than the Linear Classic strategy. Mechanical properties obtains are similar with both strategies with a maximum strength average around 1250MPa and an elongation at failure between 3 and 9%. A thermal post-processing by Hot Isostatic Pressure have been carried out on samples made by Laser Boost to increase the ductility of the material up to 15%.

ANISOTROPIC MATERIAL BEHAVIORS OF 3D PRINTED CARBON-FIBER POLYMER COMPOSITES WITH OPEN-SOURCE PRINTERS

2021 ◽  
pp. 1-8
Author(s):  
Jordan Garcia ◽  
Robert Harper ◽  
Y. Charles Lu
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Carbon Fiber ◽  
3D Printing ◽  
Open Source ◽  
Polymer Composites ◽  
Mechanical Responses ◽  
Manufacturing Technique ◽  
3D Printed ◽  
Traditional Manufacturing

Abstract Composite products are often created using traditional manufacturing methods such as compression or injection molding. Recently, additive manufacturing (3D printing) techniques have been used for fabricating composites. 3D printing is the process of producing three-dimensional parts through the successive combination of various layers of material. This layering effect in combination with exposure to ambient (or reduced) temperature and pressure cause the finished products to have inconsistent microstructures. The inconsistent microstructures along with the oriented reinforcing fibers create anisotropic parts with difficulty to predict mechanical properties. In this paper, the mechanical properties of fiber reinforced polymer composites produced by additive manufacturing technique (3D printing) and by traditional manufacturing technique (compression molding) were investigated. Three open-source 3D printers, i.e. FlashForge Dreamer, Tevo Tornado, and Prusa i3 Mk3, were used to fabricate bending samples from carbon-fiber reinforced ABS (acrylonitrile butadiene styrene). Results showed that there exist significant discrepancies and anisotropies in mechanical properties of 3D printed composites. First, the properties vary greatly among parts made from different printers. Secondly, the mechanical responses of 3D printed parts strongly depend upon the orientations of the filaments. Parts with the infill oriented along the length of the specimens showed the most favorable mechanical responses such as Young's modulus, maximum strength, and toughness. Thirdly, all 3D printed parts exhibit inferior properties to those made by conventional manufacturing. Finally, theoretical modeling has been attempted to predict the mechanical responses of 3D printed products and can be used to “design” the 3D printing processes.

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