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Optimization of GMAW Process Parameters in Ultra-High-Strength Steel Based on Prediction
Department of Mechanical Engineering, School of Energy System, LUT-University,Lappeenranta (FIN).
Laboratory of Mechanic, Department of Mechanical Engineering, ENSET Douala, University of Douala, Douala (CMR).ORCID iD: 0000-0002-7414-0271
University West, Department of Engineering Science, Division of Welding Technology. (KAMPT)ORCID iD: 0000-0002-0921-1643
2023 (English)In: Metals, ISSN 2075-4701, Vol. 13, no 8, p. 1447-1447Article in journal (Refereed) Published
Abstract [en]

Ultra-high-strength steel (UHSS) is a complex and sophisticated material that allows the development of products with reduced weight but increased strength and can assist, for example, in the automotive industry, saving fuel in vehicles and decreasing greenhouse gas emissions. Welding UHSS has a certain complexity, mainly due to the higher alloys and heat treatments involved, which can result in a microstructure with higher sensitivity to welding. The primary purpose of the current work was to select the best parameters of the gas metal arc welding (GMAW) for welding the S960 material based on prediction methods. To achieve the expected results, a finite element analysis (FEA) was used to simulate and evaluate the results. It was found that the welding parameters and, consequently, the heat input derived from the process greatly affected the UHSS microstructure. Using FEA and estimating the extension of the heat-affected zone (HAZ), the peak temperature, and even the effect of distortion and shrinkage was possible. With an increase in the heat input of 8.4 kJ/cm, the estimated cooling rate was around 70 °C/s. The presence of a softening area in the coarse grain heat-affected zone (CGHAZ) of welded joints was identified. These results led to an increase in the carbon content (3.4%) compared to the base metal. These results could help predict behaviors or microstructures based on a few changes in the welding parameters.

Place, publisher, year, edition, pages
MDPI, 2023. Vol. 13, no 8, p. 1447-1447
Keywords [en]
ultra-high-strength steel; gas metal arc welding; heat input; welding simulation; microstructural constituents
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-21106DOI: 10.3390/met13081447ISI: 001055718900001Scopus ID: 2-s2.0-85169130353OAI: oai:DiVA.org:hv-21106DiVA, id: diva2:1821510
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Available from: 2023-12-20 Created: 2023-12-20 Last updated: 2024-01-15Bibliographically approved

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Kah, Paul

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