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Microstructure and texture distribution in the bonding interface of Cu/Al composite tube fabricated by explosive welding

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Abstract

The Cu/Al composite tube has been shown to significantly increase heat exchange capacity and reduce production costs which are extensively used in condensers, evaporators, refrigeration equipment, and so on. In this work, a Cu/Al composite tube was successfully fabricated by explosive welding technique. The interface morphology and grain information in the radial-axial direction (RD-AD) and radial-tangential direction (RD-TD) sections were investigated by optical microscopy (OM), scanning electron microscopy (SEM), and electron backscattered diffraction (EBSD). The results showed that the Cu/Al composite tube had a well-welded bonding interface without obvious defects. A flat wavy structure composed of fine grains was generated at the bonding interface in the RD-TD section while a small wavy structure was formed in the RD-AD section. In addition, the phase transformation occurred in both bonding regions which produced mainly CuAl and Khatyrkite metallic phases. Furthermore, the distinct impact pressure and plastic deformation patterns in the two sections lead to different dynamic recrystallization structures and texture distributions.

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Funding

This research was financially supported by the National Natural Science Foundation of China (No.12072363), the key R & D plan (Social Development) Project of Xuzhou (No.KC21301), the Foundation of National Key Laboratory of Transient Physics (No.6142604200410), and the Foundation of Hubei Key Laboratory of Blasting Engineering (No.BL2021-03). The authors are grateful to the Advanced Analysis and Computation Center of China University of Mining and Technology.

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Authors and Affiliations

  1. State Key Laboratory for Geo-Mechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, 221116, China

    Li Jiang, Ning Luo & Hanliang Liang

  2. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, 221116, China

    Li Jiang, Ning Luo & Hanliang Liang

  3. National Key Laboratory for Remanufacturing, Beijing, 100072, China

    Yang Zhao

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  1. Li Jiang
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Contributions

Ning Luo contributed to the study conception and design. Material preparation, data collection, and analysis were performed by [Zhao Yang] and [Liang Hanliang]. The first draft of the manuscript was written by [Jiang Li] and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Ning Luo or Yang Zhao.

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Jiang, L., Luo, N., Liang, H. et al. Microstructure and texture distribution in the bonding interface of Cu/Al composite tube fabricated by explosive welding. Int J Adv Manuf Technol 123, 3021–3031 (2022). https://doi.org/10.1007/s00170-022-10371-4

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