Optimization of Weld Parameters in Wire and Arc-Based Directed Energy Deposition of High Strength Low Alloy Steels

Le, Van Thao; Si, Dinh; Dang, Van Thuc; Dinh, Duc Manh; Cao, Thi Hong; Nguyen, Van Anh Thi

doi:10.46604/aiti.2023.10658

Cited by 2 publications

(1 citation statement)

References 30 publications

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“…The powder-feeding DED processes generally use a laser energy source to melt the metal powder. The wire-feeding DED processes, known as wire plus arc additive manufacturing (WAAM), use an electric arc source to melt metal wire [2]. Most of the available advanced repairing techniques adopt powder-feeding DED processes [3].…”

Section: Introductionmentioning

confidence: 99%

Metallurgical Characterization of SS 316L Repurposed by Wire Plus Arc Additive Manufacturing

2023

Int. j. eng. technol. innov.

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This research aims to analyze the microstructures and mechanical characteristics of stainless steel (SS) 316L repurposed by wire plus arc additive manufacturing (WAAM). The SS 316L wire is deposited on a SS 316 substrate, which can be repurposed. This deposited material underwent optical microscopy, X-ray diffraction, and tensile test, and the results indicate that it features cellular and columnar dendrites at the bottom and equiaxial grains at the top. The tensile strength of the interface region between the deposited material (DM) and the base material (BM) is the highest (559 ± 4.16 MPa vs. 510 ± 4.93 MPa in DM and 540 ± 2.65 in BM), indicating that the BM and the deposited layers are strongly bonded. All the results from the defect observation, microstructures, and mechanical characteristics confirm the potential of the WAAM process for repurposing.

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Section: Introductionmentioning

confidence: 99%

Metallurgical Characterization of SS 316L Repurposed by Wire Plus Arc Additive Manufacturing

2023

Int. j. eng. technol. innov.

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Prediction models and multi-objective optimization of the single deposited tracks in laser direct metal deposition of 316L stainless steel

Doan Tat,

Le,

Duong Van

2024

Manufacturing Rev.

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Laser direct metal deposition (LDMD) is a metal additive manufacturing process, which uses a laser source to melt metal powder and deposit the molten metal into the part layer-by-layer through a nozzle. With suitable process parameters and setting conditions, a component can be fabricated with a full density. In this process, the shape of single tracks is a key indicator, which directly prescribes the quality of the process and the fabricated component. To fabricate a complex component, especially that with thin-wall structures with free of defects, controlling the single tracks' geometry and the understanding on the effects of the process parameters are essential. Therefore, this article focuses on studying the effects of process variables on single tracks' attributes in the LDMD process of SS316L and identifying the optimum variables for the deposition of SS316L thin wall structures. The observed results indicated that, among the process parameters (the scanning speed Vs, the laser power Pl, and the powder feed rate fp), Pl exhibits the highest impact contribution to the models of the deposited track width w and the deposited track penetration p with a contribution of 71.83% and 87.68%, respectively. Vs exhibits the highest contribution to the models of the deposited track height h a contribution of 49.86%. On the other hand, fp shows an insignificant impact contribution to the w and p models. All the developed models feature a high prediction accuracy with the values of determination coefficients R2 of 97.89%, 97.08%, 99.11% for w, h, and p, respectively, indicating that they can be used to prediction w, h, and p with high confidence and precision levels. Moreover, the optimization results achieved by different methods (i.e., GRA, TOPSIS, and PSO+TOPSIS) demonstrated that the PSO and TOPSIS combination can be used to find out the most optimal process parameters (i.e., Vs = 6 mm/s, Pl = 263.63 W, and fp = 18 g/min) to build thin-walled structures in SS316L by LDMD.

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Optimization of Weld Parameters in Wire and Arc-Based Directed Energy Deposition of High Strength Low Alloy Steels

Cited by 2 publications

References 30 publications

Metallurgical Characterization of SS 316L Repurposed by Wire Plus Arc Additive Manufacturing

Metallurgical Characterization of SS 316L Repurposed by Wire Plus Arc Additive Manufacturing

Prediction models and multi-objective optimization of the single deposited tracks in laser direct metal deposition of 316L stainless steel

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