Metal treatment – Compositions – Heat treating
Patent
1988-12-13
1990-09-18
Dean, R.
Metal treatment
Compositions
Heat treating
148410, C22F 110
Patent
active
049575678
ABSTRACT:
An article having improved fatigue crack growth resistance is provided through an improved nickel-base superalloy and an improved method which controls grain size and a strain rate found to be critical in processing. The alloy is selected to have a gamma prime content in the range of about 30-46 volume percent and a resistance to cracking upon rapid quenching from a selected supersolvus solutioning temperature to a selected quenching temperature. The article produced has an improved balance and combination of fatigue crack growth resistance and tensile, creep, and stress rupture properties.
REFERENCES:
patent: 3457066 (1969-07-01), Pohlman et al.
patent: 3576681 (1971-04-01), Barker et al.
patent: 3890816 (1975-06-01), Allen et al.
Kissinger Robert D.
Krueger Daniel D.
Menzies Richard G.
Wukusick Carl S.
Dean R.
General Electric Company
Maria Carmen Santa
Squillaro Jerome C.
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