Zirconium alloys

Details Zirconium alloys Zirconium alloys

1978-03-03

1980-07-15

Rutledge, L. Dewayne

Metal treatment

Compositions

Heat treating

75177, 148 32, 148133, C21D 126, C22C 1600

Patent

active

042126860

ABSTRACT:
The present invention concerns improved corrosion resistant zirconium alloys consisting of 0.25 to 1.50% by weight of niobium, 0.025 to 0.20% by weight of tin, 0.02 to 1.00% by weight of combined chromium and molybdenum, and the remainder zirconium except for unavoidable impurities.
Corrosion tests show that the above alloys have a corrosion rate comparable to Zircaloy 2 at low temperatures and a much better performance at high temperatures. Further the hydrogen uptake of the present alloys are considerably lower than for Zircaloy 2 over the whole temperature range 290.degree.-500.degree. C., and reactor tests have revealed that the good corrosion behavior is maintained under neutron irradiation. The new alloys exhibit smaller grain growth than Zircaloy 2 at annealing temperatures.

REFERENCES:
patent: 3121034 (1964-02-01), Anderko et al.
patent: 3150972 (1964-09-01), Rosler
patent: 3205070 (1965-09-01), Bertea et al.
patent: 3575806 (1971-04-01), Boulton
patent: 3664825 (1972-05-01), Bergquist
BMI-1168, "The Mechanical Properties of Zirconium and Zircaloy 2", Shaber, et al. Feb. 18, 1957, p. 3.

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