Conclusions
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1.
The resistance to welding cracks during welding and heating of weldments depends mainly on the stresses in the material.
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2.
Reduction of internal stresses by use of a hardening phase with crystallographic parameters near those of the solid solution and ensuring slow precipitation of the hardening phase make it possible to increase the resistance of weldments.
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3.
The nickel alloys hardened with intermetallic phase Ni3(Nb, Al) have high heat resistance, good workability, and are recommended for welded parts operating at temperatures up to 800°.
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Additional information
I. P. Bardin Central Scientific-Research Institute of Ferrous Metallurgy. Translated from Metallove-denie i Termicheskaya Obrabotka Metallov, No. 11, pp. 2–7, November, 1977.
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Zimina, L.N. Weldable heat-resistant nickel alloys and principles of alloying them. Met Sci Heat Treat 19, 923–927 (1977). https://doi.org/10.1007/BF00670156
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DOI: https://doi.org/10.1007/BF00670156