Effect of powder reuse on mechanical properties of Ti-6Al-4V produced through selective laser melting

Alamos, Fernando J.; Schiltz, Jessica; Kozlovsky, Kirsten; Attardo, Ross; Tomonto, Charles; Pelletiers, Tom; Schmid, Steven R.

doi:10.1016/j.ijrmhm.2020.105273

Cited by 42 publications

(28 citation statements)

References 19 publications

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“…Blending recycled powder used in previous EBM processes with virgin new powder is common practice in the additive manufacturing industry to reduce costs and waste [ 17 ]. Although the chemical composition ( Table 4 ) and lattice structure ( Figure 3 ) of the raw powder (P1) were almost unaltered with respect to the virgin new powder (P2), in agreement with Alamos et al [ 45 ], SEM images clearly showed particle aggregation through neck formation in P1 ( Figure 2 A).…”

Section: Discussionsupporting

confidence: 89%

Topological, Mechanical and Biological Properties of Ti6Al4V Scaffolds for Bone Tissue Regeneration Fabricated with Reused Powders via Electron Beam Melting

et al. 2021

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Cellularized scaffold is emerging as the preferred solution for tissue regeneration and restoration of damaged functionalities. However, the high cost of preclinical studies creates a gap between investigation and the device market for the biomedical industry. In this work, bone-tailored scaffolds based on the Ti6Al4V alloy manufactured by electron beam melting (EBM) technology with reused powder were investigated, aiming to overcome issues connected to the high cost of preclinical studies. Two different elementary unit cell scaffold geometries, namely diamond (DO) and rhombic dodecahedron (RD), were adopted, while surface functionalization was performed by coating scaffolds with single layers of polycaprolactone (PCL) or with mixture of polycaprolactone and 20 wt.% hydroxyapatite (PCL/HA). The mechanical and biological performances of the produced scaffolds were investigated, and the results were compared to software simulation and experimental evidence available in literature. Good mechanical properties and a favorable environment for cell growth were obtained for all combinations of scaffold geometry and surface functionalization. In conclusion, powder recycling provides a viable practice for the biomedical industry to strongly reduce preclinical costs without altering biomechanical performance.

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Section: Discussionsupporting

confidence: 89%

Topological, Mechanical and Biological Properties of Ti6Al4V Scaffolds for Bone Tissue Regeneration Fabricated with Reused Powders via Electron Beam Melting

et al. 2021

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“…87 A recent study by Alamos et al investigated the mechanical response as affected by powder reuse paired with process optimization of build parameters using a factorial design of experiments. 88 The powder was cycled through eight builds, and was recovered and sieved with a 63-lm mesh. There was no blending of reused and virgin powders.…”

Section: Laser Powder Bed Fusionmentioning

confidence: 99%

Oxidation in Reused Powder Bed Fusion Additive Manufacturing Ti-6Al-4V Feedstock: A Brief Review

Derimow¹,

Hrabe²

2021

JOM

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“…The maximum energies at the different radial positions shown in Fig. 13a were all located at a distance of approximately 22 mm from the center axis 5.0x10 5 1.0x10 6 1.5x10 6 2.0x10 6 2.5x10 6 3.0x10 6 Pressure amplitude P of transmitter, where the sound pressure on the axis was significantly greater than that of other radial positions, and the further away from the axis the location was, the lower the sound pressure was. All of these features were in line with the results of the numerical simulation analysis, and data fluctuations were allowed.…”

Section: Experimental Results For the Sound Pressurementioning

confidence: 92%

“…Due to the advantages of high purity, good sphericity, low oxygen content and good fluidity, high-performance spherical metal powder is widely applied in powder metallurgy industry [1][2][3], surface spraying process [4], additive manufacturing [5,6], powder injection molding [7], and electronic packaging technology [8].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation and experiment for the ultrasonic field characteristics of ultrasonic standing wave atomization

Gao

Guo

Dong

et al. 2021

J Braz. Soc. Mech. Sci. Eng.

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Ultrasonic standing wave atomization (USWA) can obtain micron-sized spherical droplets from high viscosity or high surface energy liquids, which mainly depend on the high-energy density of a sound field. In this paper, the formation of an ultrasonic field can be generated by the vibration of a tool head driven by magnetostrictive transmitters. Based on the simulation environment of Comsol Multiphysics software, the numerical study about the characteristics of ultrasonic standing wave sound field was carried out. The influence of the arrangement of transducer, the shape and parameters of transducer tool head, the length of resonator and the pressure of environment on the sound pressure was studied. Then, the influence of ultrasonic frequency on the ultrasonic standing wave sound field was studied. It could be seen that the sound pressure distribution is better when the double transmitters were facing each other, the length of the cavity was with n = 5 sound pressure nodes, and the tool head was spherical. On this basis, the influence of primary frequency (f = 20 kHz) on the sound pressure was analyzed, and the optimal ultrasonic frequency f = 19.8 kHz was obtained. The sound pressure of the ultrasonic standing wave field was measured, and the computed results were compared with the experimental results. Finally, based on the optimized parameters of the simulation, USWA was used to atomize glycerol-water solution with different concentrations. The experimental results showed that the ultrasonic standing wave field established can atomize glycerol aqueous solutions with viscosities from 1.01 × 10-3 Pa•s to 1200.58 × 10-3 Pa•s.

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Effect of powder reuse on mechanical properties of Ti-6Al-4V produced through selective laser melting

Cited by 42 publications

References 19 publications

Topological, Mechanical and Biological Properties of Ti6Al4V Scaffolds for Bone Tissue Regeneration Fabricated with Reused Powders via Electron Beam Melting

Topological, Mechanical and Biological Properties of Ti6Al4V Scaffolds for Bone Tissue Regeneration Fabricated with Reused Powders via Electron Beam Melting

Oxidation in Reused Powder Bed Fusion Additive Manufacturing Ti-6Al-4V Feedstock: A Brief Review

Numerical simulation and experiment for the ultrasonic field characteristics of ultrasonic standing wave atomization

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