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ZHANG Lingyun, MA Honghao, SHEN Zhaowu, ZHOU Guoan. Micro-structure and mechanical properties of explosively welded steel/Cu pipes and Al/Cu pipe/rod via the Russian-dolls-like experimental arrangement[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2021, 42(5): 1-6. DOI: 10.12073/j.hjxb.20201009003
Citation: ZHANG Lingyun, MA Honghao, SHEN Zhaowu, ZHOU Guoan. Micro-structure and mechanical properties of explosively welded steel/Cu pipes and Al/Cu pipe/rod via the Russian-dolls-like experimental arrangement[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2021, 42(5): 1-6. DOI: 10.12073/j.hjxb.20201009003
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Micro-structure and mechanical properties of explosively welded steel/Cu pipes and Al/Cu pipe/rod via the Russian-dolls-like experimental arrangement

  • 1.

    The Hong Kong University of Science and Technology, Hong Kong, 999077, China

  • 2.

    CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, 230027, China

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  • Received Date: October 08, 2020
  • Available Online: July 04, 2021
    Graphical Abstract
    • Abstract
  • The steel-Q235/copper-T2 pipes and aluminum-1060/copper-T2 composite pipe/rod are fabricated by an unique manufacturing process which we call it “the Russian-dolls-like experimental arrangement”. After the experiment, samples’ welding quality along the detonation direction is firstly evaluated by an optical microscope and a scanning electron microscope equipped with a backscattered electrons detector. Mechanical properties of welded samples are checked via longitudinal compression tests. Results show that due to the jet produced by part no. 6, there is a ϕ 3.0 mm spherical groove on top of the Al/Cu explosively-welded rod. Because of this, the section 8.5 mm from the top (Al/Cu couple) is not welded, while the Steel/Cu couple is not affected. Bonding interfaces of Steel/Cu and Steel/Cu couples both change from unstable ones to regular/wavy ones along the detonation direction. Atomic ratios of steel and copper around the Steel/Cu interface varies from 44∶56 to 72∶28, and AlCu and Al2Cu are identified around the Al/Cu interface via EDS analysis. Samples’ yield strength/strain in longitudinal compression for steel/Cu and Al/Cu couples are 598 MPa/5.8% and 340 MPa/4.8%, respectively.
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    • References (16)
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