Conclusions
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1.
The tensile strength of welded joints of alloys VAD1, V92ts, ATsMU, and V96 is weakly dependent on temperature down to −253°C; at −269°C the strength of welded joints of the AK8 alloy increases throughout this temperature range and at −269°C reaches a value 50% higher than at room temperature.
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2.
The relatively low values of the strength coefficient for welded joints of alloys VAD1, V92ts, and ATsMU at −253°C are due to the nucleation and development of cracks along the grain boundaries in the fusion zone or the seam. The embrittlement of welded joints of the V96 alloy is caused by the film of intermetallic compounds along the grain boundaries.
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Literature cited
H. Neiber, Theory of Notch Stresses (1961).
M. V. Zinov'ev, V. Ya. Il'ichev, V. A. Kucheryavyi, and V. V. Pustovalov, Pribory Tekh. Éksp., No. 1 (1966).
V. Ya. Il'ichev, V. A. Kucheryavyi, and L. M. Polyakov, Zavodskaya Laboratoriya, No. 9 (1966).
Additional information
Physicotechnical Institute of Low Temperatures of the Academy of Sciences of the UkrSSR. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 6, pp. 46–50, June, 1967.
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Ul'yanov, R.A., Podkuiko, V.P., Fridlyander, I.N. et al. Mechanical properties of welded joints of some aluminum alloys at low temperatures. Met Sci Heat Treat 9, 449–451 (1967). https://doi.org/10.1007/BF00657593
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DOI: https://doi.org/10.1007/BF00657593