| 摘要 |
FIELD: metallurgy. SUBSTANCE: invention relates to deformable aluminum alloys of system aluminum-zinc-copper- magnesium. Aluminum-base alloy comprises the following components, wt.-%: zinc, 5.0-9.0; magnesium, 0.3-3.0; copper, 0.3-1.3; zirconium, 0.05-0.3; iron, 0.05-0.3; silicon, 0.01-0.2; at least element of the following group: nickel, 0.01-0.2; cobalt, 0.01-0.2; aluminum, the balance. Ratio of at least element from the group: nickel, cobalt to zirconium is 1, not above, and sum of at least one element of the group: nickel, cobalt with iron is 0.4, not above. Invention provides the enhancement of destruction viscosity value K1c, reduction of residual stresses and warping. Proposed alloy can be used as structural material in aerospace industry and machine engineering. EFFECT: improved properties of alloy, enhanced working resource, expanded assortment. 8 cl, 2 tbl
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