A comprehensive study on fused filament fabrication of Ti-6Al-4V structures

Zhang, Yao-Zhong; Bai, Shengyuan; Riede, Mirko; Garratt, Elias; Roch, Aljoscha

doi:10.1016/j.addma.2020.101256

Cited by 31 publications

(23 citation statements)

References 16 publications

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“…Although the mechanical properties of the alloy fabricated by MFFF are lower than the selective laser melting (SLM) method (Gong et al , 2019), MFFF is still attractive due to its economy, simplicity and safety. Metal filaments can also be applied with a general FFF printer with an open-source software (Zhang et al , 2020; Lengauer et al , 2019), resulting in the low-cost printing equipment, when compared to other AM processes, e.g. SLM and electron beam melting (EBM) (Gonzalez-Gutierrez et al , 2018; Riecker et al , 2016; Gong et al , 2019) that need a high-energy power source unit and a controlled atmosphere printing chamber.…”

Section: Introductionmentioning

confidence: 99%

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On the build orientation effect in as-printed and as-sintered bending properties of 17-4PH alloy fabricated by metal fused filament fabrication

Suwanpreecha

Manonukul

2022

RPJ

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Purpose The purpose of this paper is to systematically investigate the influence of build orientation on the anisotropic as-printed and as-sintered bending properties of 17-4PH stainless steel fabricated by metal fused filament fabrication (MFFF). Design/methodology/approach The bending properties of 17-4PH alloy fabricated by low-cost additive manufacturing (MFFF) using three build orientations (the Flat, On-edge and Upright orientations) are examined at both as-printed and as-sintered states. Findings Unlike tensile testing where the Flat and On-edge orientations provide similar as-sintered tensile properties, the On-edge orientation produces a significantly higher bending strain with a lower bending strength than the Flat orientation. This arises from the printed layer sliding due to the Poisson's effect, which is only observed in the On-edge orientation together with the alternated layers of highly deformed and shifted voids. The bending properties show that the Upright orientation exhibits the lowest bending properties and limited plasticity due to the layer delamination. Originality/value This study is the first work to study the effect of build orientation on the flexural properties for MFFF. This work gives insight information into anisotropy in flexural mode for MFFF part design.

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Section: Introductionmentioning

confidence: 99%

“…To date, 17-4PH stainless steel (Gonzalez-Gutierrez et al , 2019), 316 L stainless steel (Kurose et al , 2020; Thompson et al , 2019) and Ti-6Al-4V (Zhang et al , 2020; Singh et al , 2020) alloys have been successfully fabricated by MFFF. However, the mechanical properties are still inconsistent.…”

Section: Introductionmentioning

confidence: 99%

On the build orientation effect in as-printed and as-sintered bending properties of 17-4PH alloy fabricated by metal fused filament fabrication

Suwanpreecha

Manonukul

2022

RPJ

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“…The main disadvantage of using filaments as feedstock is that binder systems must be adjusted to have enough mechanical strength and flexibility so the filament can be reliably processed in standard commercial MEX machines. Nevertheless, new binders are available, and filaments with copper and other sinterable powders have been reported in the literature [15,29,31,32,39,49,[51][52][53][54][55][56][57][58][59][60][61][62][63][64]. Therefore, due to the increasing popularity of filamentbased MEX, this technique was selected for shaping copper specimens in this study.…”

Section: Introductionmentioning

confidence: 99%

Bending Properties of Lightweight Copper Specimens with Different Infill Patterns Produced by Material Extrusion Additive Manufacturing, Solvent Debinding and Sintering

González-Gutiérrez

Cano

Ecker³

et al. 2021

Applied Sciences

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Material extrusion additive manufacturing (MEX) is a versatile technology for producing complex specimens of polymers, ceramics and metals. Highly-filled filaments composed of a binder system and a high-volume content of sinterable powders are needed to produce ceramic or metal parts. After shaping the parts via MEX, the binder is removed and the specimens are sintered to obtain a dense part of the sintered filler particles. In this article, the applicability of this additive manufacturing process to produce copper specimens is demonstrated. The particular emphasis is on investigating the production of lightweight specimens that retain mechanical properties without increasing their weight. The effect of infill grades and the cover presence on the debinding process and the flexural properties of the sintered parts was studied. It was observed that covers could provide the same flexural strength with a maximum weight reduction of approximately 23%. However, a cover on specimens with less than 100% infill significantly slows down the debinding process. The results demonstrate the applicability of MEX to produce lightweight copper specimens.

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“…In FFF and the other MEX techniques [ 8 , 14 , 31 , 32 , 33 , 34 , 35 , 36 ], the generation of the shape by the extrusion of material strands, known as roads, can result in defects in the gaps between the strands or weak areas if the bonding between the strands is not sufficient [ 8 ]. In early investigations, different solutions were proposed to reduce these defects [ 8 , 10 , 37 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Infill Orientation on the Properties of Zirconia Parts Produced by Fused Filament Fabrication

et al. 2020

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The fused filament fabrication (FFF) of ceramics enables the additive manufacturing of components with complex geometries for many applications like tooling or prototyping. Nevertheless, due to the many factors involved in the process, it is difficult to separate the effect of the different parameters on the final properties of the FFF parts, which hinders the expansion of the technology. In this paper, the effect of the fill pattern used during FFF on the defects and the mechanical properties of zirconia components is evaluated. The zirconia-filled filaments were produced from scratch, characterized by different methods and used in the FFF of bending bars with infill orientations of 0°, ±45° and 90° with respect to the longest dimension of the specimens. Three-point bending tests were conducted on the specimens with the side in contact with the build platform under tensile loads. Next, the defects were identified with cuts in different sections. During the shaping by FFF, pores appeared inside the extruded roads due to binder degradation and or moisture evaporation. The changes in the fill pattern resulted in different types of porosity and defects in the first layer, with the latter leading to earlier fracture of the components. Due to these variations, the specimens with the 0° infill orientation had the lowest porosity and the highest bending strength, followed by the specimens with ±45° infill orientation and finally by those with 90° infill orientation.

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A comprehensive study on fused filament fabrication of Ti-6Al-4V structures

Cited by 31 publications

References 16 publications

On the build orientation effect in as-printed and as-sintered bending properties of 17-4PH alloy fabricated by metal fused filament fabrication

On the build orientation effect in as-printed and as-sintered bending properties of 17-4PH alloy fabricated by metal fused filament fabrication

Bending Properties of Lightweight Copper Specimens with Different Infill Patterns Produced by Material Extrusion Additive Manufacturing, Solvent Debinding and Sintering

Influence of the Infill Orientation on the Properties of Zirconia Parts Produced by Fused Filament Fabrication

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