铝/镁异种合金磁脉冲焊接接头组织与性能研究

doi:10.11896/cldb.22010051

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Abstract In this work, the magnetic pulse welding was used to realize the joining between aluminum/magnesium dissimilar alloys sheets. The microstructure and mechanical properties of the joints obtained under different discharge energies were explored by optical microscope, scanning electron microscope, X-ray diffraction (XRD) and tensile test analysis methods. The results showed that the joint interface presents a waveform structure and straight structure. With the increase of discharge energy, the effective binding zone width of the interface increases gradually, reaching a maximum of 2.87 mm and the undulations at the waveform interface and the mechanical properties of the joints increased accordingly. The highest tensile shear load of the joints reached 4 679.5 N occur in discharge energy of 30 kJ, whose wave had wavelengths of 62.7 μm and amplitudes of 9.1 μm. The fracture morphology of the joints was analyzed and the results show that the weld joint was divided into two ellipse rings. Particles and a few voids were found in the inner ring, and the outer ring had streak structure. The high tensile shear load of the Al/Mg dissimilar joints was attributed to the formation of waveform structure interface which possess both mechanical interlocking and metallurgical bonding.

Key words： magnetic pulse welding aluminum/magnesium alloy dissimilar metal microstructure interfacial structure mechanical property

Published: 10 March 2023 Online: 2023-03-14

CLC number:

TG456

Fund:National Natural Science Foundation of China (51865035, 52175326), and Special Projects for Cooperation in Science and Technology in Jiangxi Province (20212BDH81007).

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	Articles by authors
	XIE Jilin
	PENG Cheng
	XIE Wanxin
	GAN Mengmeng
	ZHANG Wentao
	WU Jisi
	CHEN Yuhua

Cite this article:

XIE Jilin,PENG Cheng,XIE Wanxin, et al. Study on Microstructure and Mechanical Properties of Al/Mg Dissimilar Metal Sheet Joints by Magnetic Pulse Welding[J]. Materials Reports, 2023, 37(5): 22010051-5.

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http://www.mater-rep.com/EN/10.11896/cldb.22010051 OR http://www.mater-rep.com/EN/Y2023/V37/I5/22010051

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