Conclusions
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1.
The structure and phase composition of the heat-affected zone and the weld seam of electron-beam weldments in a zirconium alloy with 2.5% Nb are different from those in the base metal and result from quenching of the alloy from the β and α+β regions that occurs in the process of welding.
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2.
Annealing causes equalization of the phase composition in all areas of the weld. The annealing time required is ≥28 h at 550°, ≥10 h at 590°, and ≥1 h at 700°.
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Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 5, pp. 19–21, May, 1973.
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Lupakov, I.S., Rodchenkov, B.S., Vukolova, V.N. et al. Structure and phase composition of weldments in the Zr−2.5Nb alloy. Met Sci Heat Treat 15, 379–381 (1973). https://doi.org/10.1007/BF01166648
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DOI: https://doi.org/10.1007/BF01166648