High strength Sn-Mo-Nb-Zr alloy tubes and method of making same

Details High strength Sn-Mo-Nb-Zr alloy tubes and method of making same High strength Sn-Mo-Nb-Zr alloy tubes and method of making same

1976-04-28

1977-12-27

Steiner, Arthur J.

Metal treatment

Compositions

Heat treating

75177, 148 325, 176 88, C22F 118, C22C 1600

Patent

active

040653285

ABSTRACT:
Tubes for use in nuclear reactors fabricated from a quaternary alloy comprising 2.5-4.0 wt% Sn, 0.5-1.5 wt% Mo, 0.5-1.5 wt% Nb, balance essentially Zr. The tubes are fabricated by a process of hot extrusion, heat treatment, cold working to size and age hardening, so as to produce a microstructure comprising elongated .alpha. grains with an acicular transformed .beta. grain boundary phase.

REFERENCES:
patent: 4000013 (1976-12-01), MacEwen
Cheadle, et al; "Development of Texture and Structure in Zr-2.5 wt% Nb Extruded Tubes", Can. Met. Qtly., vol. 11, No. 1 (1972), pp. 121-127.
Ibrahim et al; "Creep and Stress-Rupture of High Strength Zirconium Alloys," Can. Met. Qtly., vol. 11, No. 1, (1972), pp. 273-283.

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