Microstructure homogeneity and its role in the mechanical properties of the magnetic pulse welded steel/Al tubular joint

Tianhan Hu; Hua Pan; Ping Zhu; Jiayi Zhou; Tianhai Wu; Kai Ding; Yulai Gao

Journal of Materials Research and Technology (May 2024)

Microstructure homogeneity and its role in the mechanical properties of the magnetic pulse welded steel/Al tubular joint

Tianhan Hu,
Hua Pan,
Ping Zhu,
Jiayi Zhou,
Tianhai Wu,
Kai Ding,
Yulai Gao

Affiliations

Tianhan Hu: State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China
Hua Pan: State Key Laboratory of Development and Application Technology of Automotive Steels (Baosteel Group), Shanghai, 201900, PR China; Automobile Steel Research Institute, R&D Center, Baoshan Iron & Steel Co., Ltd., Shanghai, 201900, PR China
Ping Zhu: State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China
Jiayi Zhou: State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China
Tianhai Wu: State Key Laboratory of Development and Application Technology of Automotive Steels (Baosteel Group), Shanghai, 201900, PR China; Automobile Steel Research Institute, R&D Center, Baoshan Iron & Steel Co., Ltd., Shanghai, 201900, PR China; Corresponding author. State Key Laboratory of Development and Application Technology of Automotive Steels (Baosteel Group), Shanghai, 201900, PR China.
Kai Ding: State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China; Corresponding author.
Yulai Gao: State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China; Shanghai Engineering Research Center for Metal Parts Green Remanufacture, Shanghai, 200444, PR China; Corresponding author. State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China.

Journal volume & issue: Vol. 30
pp. 7076 – 7083

Abstract

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The steel and aluminum alloy tubes were successfully joined by magnetic pulse welding (MPW). Part of the joints fractured at the interface, yet part of them fractured at the base metal (BM) of aluminum alloy. The tensile test results revealed a fluctuation of the mechanical properties of the steel/Al MPW joints, demonstrating the microstructure inhomogeneity of the MPW joints. The typical wavy interfacial morphology could be observed at the interface of the MPW joints. The element transition zone composed of elements Fe and Al were detected while no obvious intermetallic compound (IMC) layer could be traced. The good mechanical properties of steel/Al MPW joints could be attributed to the longer effective bonding length and larger element transition area. Besides, the grain refinement was observed at the interface of the MPW joint, which explained its microhardness increase.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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