Metal treatment – Compositions – Heat treating
Patent
1982-11-01
1986-03-18
Skiff, Peter K.
Metal treatment
Compositions
Heat treating
148133, C22F 118
Patent
active
045766541
ABSTRACT:
There is provided a nuclear fuel element having a zirconium alloy cladding tube with improved corrosion resistance. The cladding tube comprises a metallurgical gradient across the width of the tube wall wherein the tube has a more corrosion-resistant metallurgical condition at the outer circumference and a less corrosion-resistant metallurgical condition at the inner circumference. The metallurgical gradient can be generated by heating an outer circumferential portion of the tube to the high alpha or mixed alpha plus beta range while maintaining the inner surface at a lower temperature, followed by cooling of the tube.
REFERENCES:
patent: 3865635 (1975-02-01), Hofvenstam
patent: 4229235 (1980-10-01), Matsuda et al.
patent: 4238251 (1980-12-01), Williams et al.
patent: 4279667 (1981-07-01), Anthony et al.
patent: 4372817 (1983-02-01), Armijo et al.
Eddens Fletcher C.
Harmon John L.
White David W.
General Electric Company
James, Jr. Ivor J.
Simkins Raymond G.
Skiff Peter K.
Turner Samuel E.
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