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Gas saturation of the surface layers of welded joints of alloy OT4 after full and partial annealing in vacuum

  • Titanium and Its Alloys
  • Published:
Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    In the process of vacuum annealing of welded samples of alloy OT4 at 660° for 2 h (residual pressure p≤7.65·10−3 Pa) a gas-saturated diffusion layer with high brittleness is formed, which may lead to premature failure of structures in the course of operation.

  2. 2.

    The gas-saturated layer formed on the surface of the metal as a result of vacuum annealing at 550° for 2 h is of negligible thickness and has no essential effect on the service life of the structure.

  3. 3.

    To improve the service life of thin welded joints of alloy OT4 we recommend partial annealing in vacuum at 550° in place of full annealing.

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Literature cited

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Authors
  1. I. I. Murav'ev
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  2. O. D. Smiyan
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  3. A. B. Kolomenskii
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  4. A. N. Roshchupkin
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Additional information

Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 2, pp. 49–51, February, 1982.

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Murav'ev, I.I., Smiyan, O.D., Kolomenskii, A.B. et al. Gas saturation of the surface layers of welded joints of alloy OT4 after full and partial annealing in vacuum. Met Sci Heat Treat 24, 136–139 (1982). https://doi.org/10.1007/BF00700943

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  • DOI: https://doi.org/10.1007/BF00700943

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