Please use this identifier to cite or link to this item: http://hdl.handle.net/11452/34418
Title: Investigations on the microstructure and mechanical properties of laser welded dissimilar galvanized steel–aluminum joints
Authors: Yüce, Celalettin
Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü.
0000-0001-8474-7328
Karpat, Fatih
Yavuz, Nurettin
A-5259-2018
GKI-9429-2022
24366799400
6701698986
Keywords: Laser welding
Steel-aluminum
Intermetallic layer
Mechanical properties
Intermetallic compounds
Coated steel
Alloy
Interface
Al
Optimization
Automation & control systems
Engineering
Aluminum alloys
Aluminum alloy sheet
Issue Date: Oct-2019
Publisher: Springer
Citation: Yüce, C. vd. (2019). "Investigations on the microstructure and mechanical properties of laser welded dissimilar galvanized steel–aluminum joints". International Journal of Advanced Manufacturing Technology, 104(5-8), 2693-2704.
Abstract: In this study, galvanized high-strength steel and aluminum alloy sheets were laser-welded in zero-gap lap joint configuration. In order to determine the influences of the heat input levels, microstructural and mechanical properties of the joints were investigated. The weld bead geometry, microstructure, and intermetallic phases at the interface of welded joints were investigated using an optical microscope and scanning electron microscopy (SEM) with energy-dispersive spectroscopy (EDS) at different heat input levels. Mechanical properties and microhardness distribution of the welded joints were examined according to the weld bead dimension. The results revealed that there is a correlation between the weld seam geometry and intermetallic phase formation. At relatively high heat input level, the penetration depth increased, and thick Al-rich intermetallic layer was observed at the interface of the weld seam, which deteriorated the tensile strength of the joint. It has been found that without the need for any additional precaution, the thickness of the IMC layer can be limited to 5–15 μm when the optimum welding parameters were conducted. The experimental results showed that with limited heat input and penetration depths, up to 108.7-N/mm tensile strength could be achieved and fracture initiated at the weld seam–steel interface.
URI: https://doi.org/10.1007/s00170-019-04154-7
https://link.springer.com/article/10.1007/s00170-019-04154-7
http://hdl.handle.net/11452/34418
ISSN: 0268-3768
Appears in Collections:Scopus
Web of Science

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