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Nd/YAG pulsed laser welding of TC4 titanium alloy to 301L stainless steel via pure copper interlayer

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Abstract

Pulsed laser welding of TC4 titanium alloy to SUS301L stainless steel with copper sheet as interlayer was studied in this paper. Microstructures of the joints were analyzed by optical microscopy, scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. The mechanical properties of the joints were measured by nano-indentation test and tension test. Experimental results showed that copper interlayer was helping to decrease the Ti–Fe intermetallics by forming Cu solid solution, Cu2Ti, Cu–Ti, and Cu–Ti2 in the weld. The composition and microstructure in the weld were uneven, which led to an inhomogeneous distribution of the hardness. The average tensile strength of the joint was 350 MPa, and all the tensile samples fractured in the Cu–Ti2 layer with a maximum hardness in the weld adjacent to TC4 titanium alloy side.

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Authors and Affiliations

  1. Key Laboratory of Automobile Materials, School of Materials Science and Engineering, Jilin University, Changchun, 130022, China

    Y Zhang, D. Q Sun, X. Y Gu & Y. J Liu

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  1. Y Zhang
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  2. D. Q Sun
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  3. X. Y Gu
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  4. Y. J Liu
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Correspondence to X. Y Gu.

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Zhang, Y., Sun, D.Q., Gu, X.Y. et al. Nd/YAG pulsed laser welding of TC4 titanium alloy to 301L stainless steel via pure copper interlayer. Int J Adv Manuf Technol 90, 953–961 (2017). https://doi.org/10.1007/s00170-016-9453-z

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  • DOI: https://doi.org/10.1007/s00170-016-9453-z

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