Abstract
The Al/Mg dissimilar joints were obtained by welding-assisted riveting methods under different structural rivets on the basis of laser-arc hybrid welding source. The mechanical properties and elemental distribution of joints were investigated. When the rivet structure was straight, the maximum lap shear load of the joint was 3.7 kN. When the rivet structure was step rivet, the maximum lap shear load of the joint was 4.9 kN. The intermetallic compounds (IMCs) at the Al–Mg interface of the welded-riveted hybrid joint of the straight rivet were Mg2Al3 and Mg17Al12. The IMCs at the Al–Mg interface of the welded-riveted hybrid joint of the step rivet were Mg17Al12. There were more IMCs and more pores in the weld pool in the welded-riveted hybrid joint of the straight rivet. The welded-riveted hybrid joint of the stepped rivet structure had a small amount of Mg alloy and Al alloy melting at the Al–Mg interface, forming a transition layer of about 110 μm. Studies have shown that the distribution position of IMCs was the key problem affecting the performance of the welded-riveted hybrid joints.
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This work was supported by the National Natural Science Foundation of China (51975090, 52175290).
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Ziqian Sun: methodology, writing-original draft, formal analysis.
Hongyang Wang: conceptualization, editing and funding acquisition.
Yuchen Dong: assist experiment, validation.
Peixin Jin: assist experiment, validation.
Liming Liu: funding acquisition.
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Sun, Z., Wang, H., Dong, Y. et al. Effect of different rivet structures on the interface and properties of Al and Mg welded-riveted hybrid joining. Int J Adv Manuf Technol 125, 2277–2287 (2023). https://doi.org/10.1007/s00170-022-10735-w
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DOI: https://doi.org/10.1007/s00170-022-10735-w