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Study of the Chemical Composition and Microstructure of AISI 321/Cu/Ta/Ti Welded Joint

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Abstract

The chemical composition and microstructure of an AISI 321/Cu/Ta/Ti welded joint prepared by carbon dioxide laser is studied in this work. An analysis of the chemical composition showed that the Ta plate located between the Cu plate and Ti is the barrier for melting Ti in the welding pool. The welded joint consists of the Cu-based solid solution, austenite, and (Ta,Ti)(Fe,Cr)2 and (Ta,Ti)Сu3 intermetallic particles 10–50 µm in size. Tantalum actively interacts with the Fe-based melt. A diffusion zone consisting of β-Ti and (Ti,Ta)2Cu intermetallic particles forms near the boundary between the titanium alloy and the Ta plate. Joint fracture upon tensile tests occurs along the boundary between the (Fe + Cu) zone and Ta plate; the ultimate tensile strength is σu = 215 MPa.

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Funding

The study was performed using equipment in the Centers of Collaborative Access Plastometry at the Institute of Engineering Science, Ural Branch, Russian Academy of Sciences, under state assignment of the Ministry of Science and Higher Education of the Russian Federation in accordance with themes nos. АААА-А18-118020790145-0 and АААА-А17-117030610136-3.

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Authors and Affiliations

  1. Institute of Engineering Science, Ural Branch, Russian Academy of Sciences, 620049, Ekaterinburg, Russia

    N. B. Pugacheva, E. I. Senaeva & E. B. Trushina

  2. Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia

    A. M. Orishich & A. N. Cherepanov

Authors
  1. N. B. Pugacheva
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  2. A. M. Orishich
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  3. A. N. Cherepanov
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  4. E. I. Senaeva
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  5. E. B. Trushina
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Correspondence to N. B. Pugacheva.

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Translated by N. Kolchugina

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Pugacheva, N.B., Orishich, A.M., Cherepanov, A.N. et al. Study of the Chemical Composition and Microstructure of AISI 321/Cu/Ta/Ti Welded Joint. Phys. Metals Metallogr. 121, 1112–1118 (2020). https://doi.org/10.1134/S0031918X20110083

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  • DOI: https://doi.org/10.1134/S0031918X20110083

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