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Special Features of the Structure of Laser-Welded Joints of Dissimilar Alloys Based on Titanium and Aluminum

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Metal Science and Heat Treatment Aims and scope

The structure of laser-welded joints of parts having different thicknesses fabricated from alloys based on aluminum and titanium has been studied. Results of transmission and scanning electron microscopy measurements and x-ray diffraction analysis show that the diffusion interaction of microvolumes of two alloys in the weld leads to the formation of two interlayers: (i) a continuous intermetallic TiAl layer with thickness below 1 μm adjacent to the titanium alloy and (ii) a layer consisting of TiAl3 intermetallic dendrites with thickness of 2 – 6 μm adjacent to the TiAl layer. The average microhardness of the intermetallic layer is about 490 HV.

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Technological experiments were supported by Grant from the President of Russian Federation (project No. MK-7354.2015.8); investigations of the structure of welded joints were supported by the Russian Foundation for Basic Research (project No. 14-38-50511).

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Authors and Affiliations

  1. Novosibirsk State Technical University, Novosibirsk, Russia

    A. A. Nikulina & A. I. Smirnov

  2. Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia

    G. A. Turichin, O. G. Klimova-Korsmik & K. D. Babkin

  3. St. Petersburg State Marine Technical University, St. Petersburg, Russia

    G. A. Turichin

Authors
  1. A. A. Nikulina
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  2. A. I. Smirnov
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  3. G. A. Turichin
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  4. O. G. Klimova-Korsmik
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  5. K. D. Babkin
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Corresponding author

Correspondence to O. G. Klimova-Korsmik.

Additional information

Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 8, pp. 62 – 67, August, 2017.

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Nikulina, A.A., Smirnov, A.I., Turichin, G.A. et al. Special Features of the Structure of Laser-Welded Joints of Dissimilar Alloys Based on Titanium and Aluminum. Met Sci Heat Treat 59, 534–539 (2017). https://doi.org/10.1007/s11041-017-0185-y

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  • DOI: https://doi.org/10.1007/s11041-017-0185-y

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