Influence of particle-size distribution and temperature on the rheological properties of highly concentrated Inconel feedstock alloy 718

Claudel, Dimitri; Sahli, Mohamed; Barrière, Thierry; Gelin, Jean‐Claude

doi:10.1016/j.powtec.2017.08.049

Cited by 29 publications

(20 citation statements)

References 44 publications

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“…The CPVC should correspond to the interface torque value between the second and third regimes (point of intersection), which in the present study was 62 vol.%. However, a great number of studies performed concerning the optimization of powder and binder feedstocks show that the torque value should not exceed 5 N.m for this specific torque rheometer (Plastograph® W 50), to attain the best rheological properties, in order to guarantee optimal processability [28,33,34].…”

Section: Evaluation Of the Critical Powder Volume Concentrationmentioning

confidence: 99%

Optimization of metallic powder filaments for additive manufacturing extrusion (MEX)

Cerejo

Gatões

Vieira

2021

Int J Adv Manuf Technol

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Additive manufacturing (AM) of metallic powder particles has been establishing itself as sustainable, whatever the technology selected. Material extrusion (MEX) integrates the ongoing effort to improve AM sustainability, in which low-cost equipment is associated with a decrease of powder waste during manufacturing. MEX has been gaining increasing interest for building 3D functional/structural metallic parts because it incorporates the consolidated knowledge from powder injection moulding/extrusion feedstocks into the AM scope—filament extrusion layer-by-layer. Moreover, MEX as an indirect process can overcome some of the technical limitations of direct AM processes (laser/electron-beam-based) regarding energy-matter interactions. The present study reveals an optimal methodology to produce MEX filament feedstocks (metallic powder, binder, and additives), having in mind to attain the highest metallic powder content. Nevertheless, the main challenges are also to achieve high extrudability and a suitable ratio between stiffness and flexibility. The metallic powder volume content (vol.%) in the feedstocks was evaluated by the critical powder volume concentration (CPVC). Subsequently, the rheology of the feedstocks was established by means of the mixing torque value, which is related to the filament extrudability performance.

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Section: Evaluation Of the Critical Powder Volume Concentrationmentioning

confidence: 99%

Optimization of metallic powder filaments for additive manufacturing extrusion (MEX)

Cerejo

Gatões

Vieira

2021

Int J Adv Manuf Technol

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show abstract

“…The CPVC should correspond to the interface torque value between the second and third regimes (point of intersection), which in the present study was 62 vol.%. However, a great number of studies performed concerning the optimisation of powder and binder feedstocks show that the torque value should not exceed 5 N.m, to attain the best rheological properties, in order to guarantee optimal processability [29,33,34].…”

Section: Evaluation Of the Critical Powder Volume Concentration (Cpvc)mentioning

confidence: 99%

Optimization of Metallic Powder Filaments for Additive Manufacturing Extrusion (MEX)

Cerejo¹,

Gatões

Vieira

2021

Preprint

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Additive manufacturing (AM) of metallic powder particles has been establishing itself as sustainable, whatever the technology selected. Material Extrusion (MEX) integrates the ongoing effort to improve AM sustainability, in which low-cost equipment is associated with a decrease of powder waste during manufacturing. MEX has been gaining increasing interest for building 3D functional/structural metallic parts because it incorporates the consolidated knowledge from powder injection moulding/extrusion feedstocks into the AM scope—filament extrusion layer-by-layer. Moreover, MEX as an indirect process can overcome some of the technical limitations of direct AM processes (laser/electron-beam-based) regarding energy-matter interactions. The present study reveals an optimal methodology to produce MEX filament feedstocks (metallic powder, binder and additives), having in mind to attain the highest metallic powder content. Nevertheless, the main challenges are also to achieve high extrudability and a suitable ratio between stiffness and flexibility. The metallic powder volume content (vol.%) in the feedstocks was evaluated by the critical powder volume concentration (CPVC). Subsequently, the rheology of the feedstocks was established by means of the mixing torque value, which is related to the filament extrudability performance.

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“…The increased usage and demand for metal AM has led to an increase in the number of investigations into the complex, multi-variate relationships between the build parameters used and the resulting part properties. Materials such as Nitinol, 316L stainless steel, nickel super-alloys 625 and 718, Al alloys 6061, 7075, reinforced composites and Ti6Al4V are of interest for a variety of industries [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. 316L stainless steel has good ductility, strength, temperature resistance, biocompatibility, corrosion and fatigue resistance, cost and availability [30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

316L Stainless Steel Powders for Additive Manufacturing: Relationships of Powder Rheology, Size, Size Distribution to Part Properties

et al. 2020

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Laser-Powder Bed Fusion (L-PBF) of metallic parts is a highly multivariate process. An understanding of powder feedstock properties is critical to ensure part quality. In this paper, a detailed examination of two commercial stainless steel 316L powders produced using the gas atomization process is presented. In particular, the effects of the powder properties (particle size and shape) on the powder rheology were examined. The results presented suggest that the powder properties strongly influence the powder rheology and are important factors in the selection of suitable powder for use in an additive manufacturing (AM) process. Both of the powders exhibited a strong correlation between the particle size and shape parameters and the powder rheology. Optical microscope images of melt pools of parts printed using the powders in an L-PBF machine are presented, which demonstrated further the significance of the powder morphology parameters on resulting part microstructures.

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Influence of particle-size distribution and temperature on the rheological properties of highly concentrated Inconel feedstock alloy 718

Cited by 29 publications

References 44 publications

Optimization of metallic powder filaments for additive manufacturing extrusion (MEX)

Optimization of metallic powder filaments for additive manufacturing extrusion (MEX)

Optimization of Metallic Powder Filaments for Additive Manufacturing Extrusion (MEX)

316L Stainless Steel Powders for Additive Manufacturing: Relationships of Powder Rheology, Size, Size Distribution to Part Properties

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