High temperature softening resistance of alloy 688 and modified

Details High temperature softening resistance of alloy 688 and modified High temperature softening resistance of alloy 688 and modified

1977-12-05

1979-04-10

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75162, 148 132, C22C 904

Patent

active

041486358

ABSTRACT:
The improved high temperature softening resistance of Alloy 688 and modified 688 is obtained by the addition of niobium to the alloys. These particular alloy systems not only exhibit resistance to high temperature softening, but also exhibit improved stress corrosion and stress relaxation resistance properties. All of these properties are attained without any loss in the high strength properties of the base alloy systems.

REFERENCES:
patent: 2169188 (1939-08-01), Kelly
patent: 3484307 (1969-12-01), Eichelman et al.
patent: 3544313 (1970-12-01), Sadoshima et al.
patent: 3703367 (1972-11-01), Cocks

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