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2 048 592

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C1

(51)

IPC

(21) (22)

Application

94015255/02, 1994-04-27

(22)

Actual filing date

1994-04-27

(45)

Published

1995-11-20

(72)

Inventor

Sheveleva L.M.Grushko O.E.Shnejder G.L.

(73)

Holder

Vserossijskij Institut Aviatsionnykh Materialov

METHOD FOR MANUFACTURE OF SEMIFINISHED AND/OR FINISHED ARTICLES FROM ALUMINIUM-LITHIUM ALLOYS Russian patent published in 1995 - IPC

Abstract RU 2048592 C1

FIELD: manufacture of semifinished and/or finished articles from aluminium- lithium alloys for new engineering equipment including welded structures in aircraft industry. SUBSTANCE: method involves producing a cast homogenized, pressed or rolled blank, annealing it for coagulation of surplus phases, deformations at 250-420 C and a degree of 15-60% followed by annealing at 250-450 C, final deformation at a degree of 15-60% and 270-480 C, hardening at a cooling rate of 0,5-3Vcr and ageing. Ageing may be followed by welding and final ageing. EFFECT: higher failure toughness of main material and reduced residual stresses in welded joints. 8 cl, 2 tbl

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RU 2 048 592 C1

Authors

Sheveleva L.M.

Grushko O.E.

Shnejder G.L.

Dates

1995-11-20—Published

1994-04-27—Filed

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