Experimental Study of Disruption of Columnar Grains During Rapid Solidification in Additive Manufacturing

Manogharan, Guhaprasanna; Yelamanchi, Bharat; Aman, Ronald; Mahbooba, Zaynab

doi:10.1007/s11837-015-1800-2

Cited by 10 publications

(4 citation statements)

References 12 publications

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“…A better method is needed to release the heat from the printed part during deposition with the use of active cooling, such as a water-cooled chill plate, which would cut down the waiting time between layers and thus accelerate part production. Finally, methods of monitoring 3-D printing with GMAW print heads are needed for real time correction and control (e.g., by adapting scanning and capture technology [61] or applying low cost webcam techniques developed for polymer-based RepRap systems [62]) and eventually using advanced techniques (e.g., ultrasonic vibrations) to alter/improve the quality of the metal print in real time [63].…”

Section: Discussionmentioning

confidence: 99%

Applications of Open Source GMAW-Based Metal 3-D Printing

Nilsiam

Sanders

Pearce

2018

JMMP

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The metal 3-D printing market is currently dominated by high-end applications, which make it inaccessible for small and medium enterprises, fab labs, and individual makers who are interested in the ability to prototype and additively manufacture final products in metal. Recent progress led to low-cost open-source metal 3-D printers using a gas metal arc welding (GMAW)-based print head. This reduced the cost of metal 3-D printers into the range of desktop prosumer polymer 3-D printers. Consequent research established good material properties of metal 3-D printed parts with readily-available weld filler wire, reusable substrates, thermal and stress properties, toolpath planning, bead-width control, mechanical properties, and support for overhangs. These previous works showed that GMAW-based metal 3-D printing has a good adhesion between layers and is not porous inside the printed parts, but they did not proceed far enough to demonstrate applications. In this study, the utility of the GMAW approach to 3-D printing is investigated using a low-cost open-source metal 3-D printer and a converted Computer Numerical Control router machine to make useful parts over a range of applications including: fixing an existing part by adding a 3-D metal feature, creating a product using the substrate as part of the component, 3-D printing in high resolution of useful objects, near net objects, and making an integrated product using a combination of steel and polymer 3-D printing. The results show that GMAW-based 3-D printing is capable of distributed manufacturing of useful products for a wide variety of applications for sustainable development.

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Section: Discussionmentioning

confidence: 99%

Applications of Open Source GMAW-Based Metal 3-D Printing

Nilsiam

Sanders

Pearce

2018

JMMP

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“…In a study [28] researchers outlined a technology of ultrasonic vibration applied for the grain refinement in the crystallization process. A torch for weld deposition in shielding gases was made by a 3D printer for surfacing layers of soft steel ER70S-6.…”

Section: Fig 3 Additive Manufacturing Of Metal Productsmentioning

confidence: 99%

Additive Manufacturing of Metal Products via Filler Wire Arc Welding (Review)

Kuznetsov

Chinakhov

Lavrova³

et al. 2022

MSF

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The paper presents a state-of-the-art review of additive manufacturing and summarizes its development trends. It considers mainstreams of this technology and outlines its methods. The study highlights importance and prospects of the process based on electrode wire arc welding (GMAW and GTAW). It proposes a layered electric arc deposition by a consumable electrode in shielding gases. A peculiarity of this procedure is that a wire is preheated to a temperature of 400-600°С before fed into a zone where metal products are formed. Wire preheating is realized by an additional power supply placed at a distance of 250-400 mm from a wire end to conduct a preheating current. It is suggested this process is suitable for manufacturing metal products in principle. The study has revealed a gradient structure of product walls manufactured using this technology. It is an upper deposited layer only that has a dendrite structure. Layers below it are subject to repeated thermal treatment caused by heat liberation from the upper layer. As a result, a grain tends to the refinement up to 10 μm depth wise. The most important outcome to emerge from the study is that a 4 mm thick frame structure free of defects may be built given that deposition is carried out by a material with a diameter of 1.2 mm in the conditions: current force 120-140А, voltage 22-24 V, deposition rate 300 mm/min.

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“…Heat emitted from the moving welding arc was considered as a volumetric heat source with double elliptical distribution (Fig. 1) [1][2][3][4][5][6][7][8][9][10][11][12][13] and calculated according to the equations below (Eq. 2,3):…”

Section: Figure 1 -Geometrical Model Of the Problem Under Considerationmentioning

confidence: 99%

Numerical Modeling of Thermal Processes while Depositing Layers in Additive Production

Kuznetsov

Krampit

Kryukov

et al. 2018

MSF

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The up to date industry tends to introduce additive technologies in all fields of production, since their use furthers manufacturing of sufficiently qualitative products in a quite quick and economical way.As a consequence, it is still a topical issue how to control quality of the output products.The paper reports on a numerical model of thermal processes in a substrate plate and in a product while depositing.Temperature distribution patterns and a penetration form of a substrate plate are considered for the entire process of deposition.

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Experimental Study of Disruption of Columnar Grains During Rapid Solidification in Additive Manufacturing

Cited by 10 publications

References 12 publications

Applications of Open Source GMAW-Based Metal 3-D Printing

Applications of Open Source GMAW-Based Metal 3-D Printing

Additive Manufacturing of Metal Products via Filler Wire Arc Welding (Review)

Numerical Modeling of Thermal Processes while Depositing Layers in Additive Production

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