Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1992-03-03
1993-09-14
Roy, Uprendra
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148677, 420410, C22F 100
Patent
active
052445151
ABSTRACT:
A method of increasing intergranular stress corrosion cracking resistance of Alloy 718 in water reactor environments is described where the alloy is heat treated at a high solution annealing temperature to dissolve grain boundary precipitates formed during thermomechanical processing. A water quenching step is advantageously employed following the high solution annealing. The alloy is then aged at two separate temperatures and finally air cooled to room temperature.
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Miglin et al, Effect of Heat Treatment on Stress Corrosion of Alloy 718 In PWR Primary Water, 5th Symposium, Monterey, Calif., Aug. 25-29, 1991.
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Copies of Overheads presented at oral presentation at an EPRI's contractors meeting on Mar. 5, 1991.
Edwards Robert J.
Kalka Daniel S.
Matas Vytas R.
Roy Uprendra
The Babcock & Wilcox Company
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