Abstract
Tubes have been formed from the intermediate phase Zr3Al (L12 type) which is of potential use as a structural element in thermal nuclear power reactors. The procedure is to extrude Zr/Zr2Al two-phase ingots at temperatures above 1270 K in theβ Zr + Zr2Al two-phase field and then transform the extruded product at lower temperatures to Zr3Al via the peritectoid transformation Zr + Zr2Al → Zr3Al. For small tubes (⪝ 3.2 cm OD) the extrusion constants at 1375 and 1425 K, respectively, are ≃ 400 and ≃ 300 MN/m2 for the conditions chosen. The experimental extrusions indicate no fundamental barriers to forming pressure tubes from Zr-Al alloys containing 7.6 to 9.0 wt pct Al.
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References
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Schulson, E.M., Stewart, M.J. The forming of Zr3Al-base alloys. Metall Trans B 7, 363–368 (1976). https://doi.org/10.1007/BF02652706
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DOI: https://doi.org/10.1007/BF02652706