Low temperature underaging process for lithium bearing alloys

Details Low temperature underaging process for lithium bearing alloys Low temperature underaging process for lithium bearing alloys

1985-11-21

1989-06-20

Yee, Deborah

Metal treatment

Compositions

Heat treating

148159, 148415, 148416, 148417, C22F 104

Patent

active

048406821

ABSTRACT:
The combination of strength and fracture toughness properties of aluminum-lithium alloys are significantly enhanced by underaging the alloys at temperatures ranging from 200.degree. F. to below 300.degree. F. for relatively long periods of time.

REFERENCES:
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E. H. Spuhler, "Alcoa Alloy X-2020", Alcoa Aluminum Company of America, 1958.
T. H. Sanders, "Factors Influencing Fracture Toughness and Other Properties of Aluminum-Lithium Alloys", Final Report, Contract No. N62269-76-C-0271, 1979.
T. H. Sanders, Jr. and E. A. Starke, Jr., "Aluminum-Lithium Alloys", Proceedings of the First International Aluminum-Lithium Conference sponsored by the TMS-AIME Nonferrous Metals Committee at Stone Mountain, Georgia, May 19-21, 1980.
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GB 2 115 836 A, 9-14-83, United Kingdom.
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Harris et al., "Effect of Composition and Heat Treatment on Strength and Fracture Characteristics of Al-Li-Mg Alloys", in Aluminum-Lithium Alloys II, Proceedings of the Second International Aluminum-Lithium Conference at Monterey, CA, Apr. 12-14, 1983, ed. by Starke et al., AIME, Warrendale, PA, pp. 219-233, 1984.
European Search Report for EP 84 11 5925.

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