Investigation on microstructure and mechanical properties of the dissimilar lap welding of Al alloy to steel with different filler materials and laser powers

Two types of filler materials, FeCoCrNiMn and Al-10Si-0.3 Mg powder, were utilized to achieve lap welding of 5083 aluminum alloy to DP780 steel using laser deposition welding at various laser powers. By conducting a comparative analysis of the macroscopic morphology, microstructure, hardness, and sh...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2024-09, Vol.134 (1-2), p.935-948
Main Authors: Li, Bin, Han, Shanguo, Ao, Wenjun, Yang, Yongqiang, Liu, Dejia
Format: Article
Language:English
Subjects:
Aluminum
Aluminum base alloys
CAE) and Design
Computer-Aided Engineering (CAD
Dissimilar material joining
Dissimilar metals
Engineering
Fillers
Hardness
Heat transmission
Industrial and Production Engineering
Intermetallic compounds
Iron
Lap joints
Lap welding
Laser beam welding
Laser deposition
Lasers
Magnesium
Mechanical Engineering
Mechanical properties
Media Management
Microstructure
Morphology
Original Article
Shear properties
Weld metal
Welded joints
Welding parameters
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Summary:Two types of filler materials, FeCoCrNiMn and Al-10Si-0.3 Mg powder, were utilized to achieve lap welding of 5083 aluminum alloy to DP780 steel using laser deposition welding at various laser powers. By conducting a comparative analysis of the macroscopic morphology, microstructure, hardness, and shear properties of two groups of welded joints, the effects of multi-principal filler material and heat input on the weld formation, microstructure evolution, and shear properties of dissimilar lap joints were evaluated and discussed. An interesting finding was that, compared to the Al-10Si-0.3 Mg powder, the FeCoCrNiMn powder used as filler material had significant advantages in reducing the hardness of the weld zone and improving the shear properties of the lap-welded joints. The multi-principal powder of FeCoCrNiMn was unable to prevent the formation of Fe-Al intermetallic compounds in the weld metal. However, it did alter the elemental compositions and grain morphologies in the weld metal when compared to the Al-10Si-0.3 Mg powder. Moreover, selecting welding parameters with a low heat input was appropriate for the dissimilar metal joining of aluminum to steel using laser deposition welding.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-024-14185-4