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Optimization of Process Parameters to Improve the Effective Area of Deposition in GMAW-Based Additive Manufacturing and its Mechanical and Microstructural Analysis

School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China
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Metals 2019, 9(7), 775; https://doi.org/10.3390/met9070775
Received: 29 May 2019 / Revised: 28 June 2019 / Accepted: 5 July 2019 / Published: 10 July 2019
(This article belongs to the Special Issue Arc-based Additive Manufacturing)

Abstract

Additive manufacturing of metals using gas metal arc welding has an associated problem of variations of height in the onset and extinguishing parts of the weld bead. In this research, robot-assisted welding has been performed to investigate the problem, using AWS ER70S-6 low alloy steel welding electrode wire. After adjustment of welding parameters for a single-layer, single-pass, an optimal profile of welding energy was used to construct a thin wall which exhibited good forming characteristics with an effective area of approximately 97%. The resulting structure was ductile in nature with better tensile strength and microhardness as compared to the rolled steel available in industry with similar carbon content. The microstructure analysis revealed equiaxed grains in most parts of the structure having a fine grain size. View Full-Text
Keywords: additive manufacturing; gas metal arc welding (GMAW); microstructure; forming appearance; effective area; welding parameters additive manufacturing; gas metal arc welding (GMAW); microstructure; forming appearance; effective area; welding parameters
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Waqas, A.; Qin, X.; Xiong, J.; Wang, H.; Zheng, C. Optimization of Process Parameters to Improve the Effective Area of Deposition in GMAW-Based Additive Manufacturing and its Mechanical and Microstructural Analysis. Metals 2019, 9, 775.

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