Traditional and additive manufacturing of a new Tungsten heavy alloy alternative

Bose, A.; Schuh, Christopher A.; Tobia, Jay; Tunçer, Nihan; Mykulowycz, Nicholas M.; Preston, A. P.; Barbati, Alexander C.; Kernan, Brian D.; Gibson, Michael A.; Krause, D.; Brzezinski, T.; Schroers, Jan; Fulop, Ricardo; Myerberg, Jonah S.; Sowerbutts, Mark; Chiang, Yet‐Ming; Hart, A. John; Sachs, Emanuel M.; Lomeli, Ester E.; Lund, Alan C.

doi:10.1016/j.ijrmhm.2018.01.019

Cited by 89 publications

(40 citation statements)

References 13 publications

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“…The determination of the limits of the design of experiment (DoE) was previously discussed in Reference [40]. Five specimens per set of printing conditions were fabricated at a time.…”

Section: Design Of Experiments (Doe)-central Composite Designmentioning

confidence: 99%

Optimization of the 3D Printing Parameters for Tensile Properties of Specimens Produced by Fused Filament Fabrication of 17-4PH Stainless Steel

et al. 2020

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Fused filament fabrication (FFF) combined with debinding and sintering could be an economical process for three-dimensional (3D) printing of metal parts. In this paper, compounding, filament making, and FFF processing of feedstock material with 55% vol. of 17-4PH stainless steel powder in a multicomponent binder system are presented. The experimental part of the paper encompasses central composite design for optimization of the most significant 3D printing parameters (extrusion temperature, flow rate multiplier, and layer thickness) to obtain maximum tensile strength of the 3D-printed specimens. Here, only green specimens were examined in order to be able to determine the optimal parameters for 3D printing. The results show that the factor with the biggest influence on the tensile properties was flow rate multiplier, followed by the layer thickness and finally the extrusion temperature. Maximizing all three parameters led to the highest tensile properties of the green parts.One of the most commonly used AM technologies for the production of metal parts is PBF. In PBF, a laser or electron beam selectively fuses metal powder or metal powder covered with a binding agent by scanning cross-sectional layers generated from a CAD file of the part on the surface of a powder bed. After one cross-section is scanned, the powder bed is lowered and a new layer of powder is added on top of the previous one; the process repeats until the part is finished [6]. One of the biggest disadvantages of PBF is that it relies on high-power lasers or high-energy electron beams, which can be very costly. In addition, the powder must be free-flowing and, therefore, it requires a specific powder distribution, which adds to the price of the material. Therefore, MEAM shows great promise as a cost-effective alternative since the shaping equipment is orders of magnitude cheaper than PBF [6], and powders with a great range of particle size distributions can be processed. In the most common type of MEAM, the building material is supplied in the form of spooled filaments and, therefore, is also known as fused filament fabrication (FFF). In most FFF machines, the filament is fed into a heating unit with a nozzle using counter-rotating rollers as a feeding system. The extrusion head is controlled to move in the XY plane, and, as it moves, material is extruded through the nozzle on a flat platform that moves in the Z-direction [5]. However, there are also MEAM systems, where the extrusion system is fixed and the printing platform moves in three axes [7], and systems where the printed head moves in three axes and the building platform is fixed [8].FFF was first developed for polymeric materials; however, for the fabrication of metal or ceramic parts, a filament made of a polymeric blend filled with a large portion of metal or ceramic particles, known as feedstock, is used. After shaping the filament into what is referred to as the green parts, the binder system is removed from the part by thermal, catalytic, or solvent extraction and then sintered to ob...

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“…The determination of the limits of the design of experiment (DoE) was previously discussed in Reference [40]. Five specimens per set of printing conditions were fabricated at a time.…”

Section: Design Of Experiments (Doe)-central Composite Designmentioning

confidence: 99%

Optimization of the 3D Printing Parameters for Tensile Properties of Specimens Produced by Fused Filament Fabrication of 17-4PH Stainless Steel

et al. 2020

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“…Selective laser sintering (SLS) adalah teknik pembuatan aditif manufaktur (AM) yang menggunakan laser sebagai sumber daya untuk menyinter bahan bubuk (biasanya nilon atau poliamida), mengarahkan laser secara otomatis pada titik-titik di ruang yang ditentukan oleh model 3D, mengikat bahan bersama-sama untuk menciptakan struktur yang solid [3].…”

Section: Selective Laser Sintering (Sls)unclassified

Desain dan Manufaktur Model Piston Jupiter MX 135 cc Dengan Menggunakan 3D Printer

Siregar¹,

Napitupulu²,

Siagian³

2020

SJoME

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A product that will be mass produced requires an initial prototype so that it can assess whether a product design meets the desired criteria and is ready to be mass produced. For the purposes of making the initial prototyping, one alternative is to use 3D printing. Prototyping is an early example of a concept as part of the product development process. Rapid Prototyping allows the visualization of a 3D (three-dimension) image into an original three-dimensional object that has a volume. In addition, rapid prototyping products can also be used to test certain parts. In the design process the 2017 Solidworks software and manufacturing process are used anet type 3D printer. In the manufacturing process many 3D Printer parameters must be regulated and very influential on the manufacturing results to be obtained, including the 3D printer parameter settings in the slicing process. This is a process that is very influential on the results, where the process of slicing the material temperature, printing speed, wall thickness, layer thickness and support must be set properly. In the future it is expected that research on 3D printing manufacturing results with the same printer parameters for the design results of some CAD software.

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“…Таким образом, в наночастицах сложной формы рост взаимной растворимости компонентов приводит к существенному (на 70−80%) снижению фононной теплопроводности. Форма реальных наночастиц, соответствующая низким фрактальным размерностям, не является редким случаем (см., например, [22,26,27]). Высокие величины коэффициента формы k также достижимы в вытянутых вискероподобных структурах (величина k, соответствующая фрактальным размерностям D < 2.57, отвечает сплюснутому эллипсоиду вращения с отношением осей a/b > 5; синтез подобного рода структур производился авторами [22]), что позволяет ожидать более низких значений κ ph для протяженных в одном направлении частиц.…”

Section: результаты моделирования и обсуждениеunclassified

Фононная теплопроводность и фазовые равновесия в наночастицах системы Bi-Sb фрактальной формы

Шишулин¹,

Fedoseev²,

Шишулина³

2019

Журнал Технической Физики

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The thermal conductivity component associated with lattice vibrations is one of the quantities determining the thermoelectric activity of a material. We have simulated the dependences of phase composition and the phonon component of the thermal conductivity associated with it on the shape of nanoparticles of a Bi–Sb alloy with an equiatomic composition and with core–shell configuration. The shape of a particle is simulated by a coefficient corresponding to the extent of deviation of the particle shape from spherical or by its fractal dimension. It is shown that mutual solubilities of components depend on the nanoparticle shape and on the mutual arrangement of coexisting phases, and the thermodynamic equilibrium position for particles with complex morphology corresponds to the homogeneous state. Homogenization of a nanoparticle reduces the phonon component of its thermal conductivity by 70–80%.

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Traditional and additive manufacturing of a new Tungsten heavy alloy alternative

Cited by 89 publications

References 13 publications

Optimization of the 3D Printing Parameters for Tensile Properties of Specimens Produced by Fused Filament Fabrication of 17-4PH Stainless Steel

Optimization of the 3D Printing Parameters for Tensile Properties of Specimens Produced by Fused Filament Fabrication of 17-4PH Stainless Steel

Desain dan Manufaktur Model Piston Jupiter MX 135 cc Dengan Menggunakan 3D Printer

Фононная теплопроводность и фазовые равновесия в наночастицах системы Bi-Sb фрактальной формы

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