Influence of Specimen Layout on 17-4PH (AISI 630) Alloys Fabricated by Low-Cost Additive Manufacturing

Suwanpreecha, Chanun; Seensattayawong, Phanuphak; Vadhanakovint, Vorawat; Manonukul, Anchalee

doi:10.1007/s11661-021-06211-x

Cited by 41 publications

(44 citation statements)

References 28 publications

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“…Previously published studies have shown that fast printing speeds decrease the green part density. The maximum possible printing speed of 24 mm/s is thus in a similar range to previously published optimum printing speeds of 20 mm/s [ 16 , 17 , 38 ]. By applying 4 mm/s increments, the resulting printing speed interval ranges from 4 to 24 mm/s, and those printing speeds that satisfy Equation (6) are highlighted in gray in Table 3 .…”

Section: Resultssupporting

confidence: 80%

“…Since parts produced by MEX generally exhibit a distinct anisotropy in their mechanical properties [ 35 , 36 , 37 ], a total of three different build orientations (flat, side, and vertical) were analyzed, as can be seen in Figure 9 . The anisotropy is due to the layer bonding which is significantly stronger along the layers than between them [ 38 ]. For each build orientation, four tensile specimens were printed.…”

Section: Methodsmentioning

confidence: 99%

“… Schematic representation of fracture model (cf. [ 38 ]): ( a ) Flat orientation: crack growth within extrusion paths; ( b ) vertical orientation: crack growth between the layer bonding. …”

Section: Figurementioning

confidence: 99%

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Piston-Based Material Extrusion of Ti-6Al-4V Feedstock for Complementary Use in Metal Injection Molding

et al. 2022

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Piston-based material extrusion enables cost savings for metal injection molding users when it is utilized as a complementary shaping process for green parts in small batch sizes. This, however, requires the use of series feedstock and the production of sufficiently dense green parts in order to ensure metal injection molding-like material properties. In this paper, a methodological approach is presented to identify material-specific process parameters for an industrially used Ti-6Al-4V metal injection molding feedstock based on the extrusion force. It was found that for an optimum extrusion temperature of 95 °C and printing speed of 8 mm/s an extrusion force of 1300 N ensures high-density green parts without under-extrusion. The resulting sintered part properties exhibit values comparable to metal injection molding in terms of part density (max. 99.1%) and tensile properties (max. yield strength: 933 MPa, max. ultimate tensile strength: 1000 MPa, max. elongation at break: 18.5%) depending on the selected build orientation. Thus, a complementary use could be demonstrated in principle for the Ti-6Al-4V feedstock.

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Section: Resultssupporting

confidence: 80%

Section: Methodsmentioning

confidence: 99%

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Piston-Based Material Extrusion of Ti-6Al-4V Feedstock for Complementary Use in Metal Injection Molding

et al. 2022

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“…This process has become increasingly popular for various material fabrications, such as ceramic, polymer and metal [2][3][4][5]. Many metal AM processes, such as powder bed fusion (PBF), direct energy deposition (DED) and materials extrusion (MEX) can successfully fabricate various metals, e.g., stainless steel [6][7][8][9], titanium alloys [10][11][12][13], nickel alloys [14][15][16][17][18], cobalt [19,20] and aluminium alloys [21][22][23][24][25]. AM can also provide a high degree of freedom, lightweight design with almost unlimited shape, complexity and a varied range of sizes depending on the printing process [26].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, dimensions of the CAD model need to be carefully compensated to acquire the required dimension after sintering. The sintered density and mechanical properties of the metal MEX part are theoretically lower than those of MIM due to the voids between deposited paths generated during printing [8]. Thereby, the print strategy, which can generate not only such voids but also deflection and incomplete weld in polymer 3D-print parts [128][129][130], needs to be carefully controlled for metal MEX before progressing to the debinding and sintering.…”

Section: Introductionmentioning

confidence: 99%

A Review on Material Extrusion Additive Manufacturing of Metal and How It Compares with Metal Injection Moulding

Suwanpreecha¹,

Manonukul²

2022

Metals

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Material extrusion additive manufacturing of metal (metal MEX), which is one of the 3D printing processes, has gained more interests because of its simplicity and economics. Metal MEX process is similar to the conventional metal injection moulding (MIM) process, consisting of feedstock preparation of metal powder and polymer binders, layer-by-layer 3D printing (metal MEX) or injection (MIM) to create green parts, debinding to remove the binders and sintering to create the consolidated metallic parts. Due to the recent rapid development of metal MEX, it is important to review current research work on this topic to further understand the critical process parameters and the related physical and mechanical properties of metal MEX parts relevant to further studies and real applications. In this review, the available literature is systematically summarised and concluded in terms of feedstock, printing, debinding and sintering. The processing-related physical and mechanical properties, i.e., solid loading vs. dimensional shrinkage maps, sintering temperature vs. relative sintered density maps, stress vs. elongation maps for the three main alloys (316L stainless steel, 17-4PH stainless steel and Ti-6Al-4V), are also discussed and compared with well-established MIM properties and MIM international standards to assess the current stage of metal MEX development.

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Effect of Heat Treatment on Fracture Behavior of AISI 630 Alloy Manufactured by Directed Energy Deposition

et al. 2023

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AISI 630 alloy is widely used in the manufacture of CFM56 series aeroengine fan casing because of its high strength and excellent ductility. Herein, AISI 630 alloy is directly manufactured by directed energy deposition. The microstructural evolution, mechanical properties, and fracture behavior of AISI 630 alloy in as‐deposition, solution, and aging conditions are analyzed. Scanning electron microscopy, X‐ray diffraction, and electron backscattering diffraction are used to characterize the microstructure and phase characteristics. Mechanical tensile and Vickers hardness tests are performed. The results show that the samples as‐deposited, solution, and solution and aging samples are all composed of α phase and small amount γ phase, where γ phase proportions are 10.6%, 0.2%, and 10.8%, respectively. Due to transformation‐induced plasticity effect, the as‐deposited specimens have the highest strain hardening coefficient (0.410–0.432), which results in the tensile strength of 1121–1143 MPa, the yield strength of 279–293 MPa, and the fracture elongation of 14.9%. After solution and aging treatment, the tensile strength is increased by about 8% (1206–1239 MPa), the elongation at break is decreased by about 30% (9.6–11.4%), and the yield strength is increased by more than one time (740–907 MPa).

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Influence of Specimen Layout on 17-4PH (AISI 630) Alloys Fabricated by Low-Cost Additive Manufacturing

Cited by 41 publications

References 28 publications

Piston-Based Material Extrusion of Ti-6Al-4V Feedstock for Complementary Use in Metal Injection Molding

Piston-Based Material Extrusion of Ti-6Al-4V Feedstock for Complementary Use in Metal Injection Molding

A Review on Material Extrusion Additive Manufacturing of Metal and How It Compares with Metal Injection Moulding

Effect of Heat Treatment on Fracture Behavior of AISI 630 Alloy Manufactured by Directed Energy Deposition

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