Abstract
The prospects of the use of aluminum — lithium alloys in the aircaft, industry are due to their diminished density and high rigidity as compared to the similar properties of alloys without lithium. This makes it possible to diminish considerably the mass of the structure, which greatly influences the fuel and weight efficiency of the product. The demand for such alloys in aircraft engineering grows steadily. The pioneer alloys of this kind belonged to the Al−Mg−Li system, then came Al−Cu−Li alloys. With the recent creation of alloys in the Al−Li−Cu−Mg system the application range of the alloys has widened substantially. Their main disadvantages include the low adaptability to manufacture and the tendency to embrittlement in the process of long-term operation at a temperature much above room temeprature, for example, in solar heating. The present paper is devoted to the special features of the decomposition of the supersaturated solid solution in a new promising alloy 1470 (Al−Li−Mg−Cu) and the nature of the phases formed. The obtained results have been used for developing practical recommendations for the choice of regimes for reinforcing heat treatment of semiproducts from alloy 1470.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
G. L. Shneider, S. F. Danilov, and E. N. Malysheva, “Stability of the supersaturated solid solution of alloy 1421,”Tsvetn. Met., No. 3, 52–54 (1993).
G. L. Shneider, L. M. Sheveleva, and E. Ya. Kaputkin, “Phase transformations in heat treatment of alloy 1420,”Tsvetn. Met., No. 2, 49–52 (1994).
G. L. Shneider, A. M. Drits, N. A. Parkhomenko, and T. V. Krymova, “Stability of the supersaturated solid solution of alloy 1450,”Metalloved. Term. Obrab. Met., No. 6, 6–8 (1993).
I. N. Fridlyander, K. V. Chuistov, A. A. Berezina, and N. N. Kolobnev,Aluminum — Lithium Alloys, the Structure and Properties [in Russian], Naukova Dumka, Kiev (1992).
G. N. Colvin and E. A. Starke, “Quench sensitivity of the Al−Li−Cu−Mg alloy 8090,”Sample Quarterly,19(4), 10 (1988).
G. L. Shneider and A. M. Drits, “Hardenability of aluminum — lithium alloys,”Metalloved. Term. Obrab. Met., No. 9, 26–30 (1995).
A. M. Drits, S. B. Kornilov, and P. L. Dain, “Effect of the chemical composition and heat treatment regimes on the structure and properties of pressed semiproducts from alloy 1470,”Fekhnol. Legk. Splav., No. 3-4, 32–37 (1994).
A. A. Alekseev and L. B. Ber, “Diagrams of phase transformations in aging of aluminum alloys of the Al−Zn−Mg−(Cu), Al−Li−Cu and Al−Li−Cu−Mg systems,”Tekhnol. Legk. Splav., No. 5, 15 (1991).
A. A. Alekseev, V. N. Anan'ev, L. B. Ber, et al.,Metal Science and Treatment of Nonferrous Metals [in Russian], Nauka, Moscow (1992).
G. L. Shneider, “Phase transformations in heat treatment of Al−Li alloys and optimization of the operational properties of semiproducts from them,”Metalloved. Term. Obrab. Met., No. 1, 24–30 (1998).
I. N. Fridlyander, V. S. Sandler, and T. I. Nikol'skaya, “Changes in the phase composition of alloy 1420 in aging,”Metalloved. Term. Obrab. Met., No. 5, 2–5 (1971).
G. L. Shneider, “On some laws of reduction of warping in large stamped preforms from aluminum alloys,”Metalloved. Term. Obrab. Met., No. 6, 9–13 (1996).
G. L. Shneider, L. M. Sheveleva, Yu. V. Shchelbanin, and Yu. P. Plotnikov, “Regulating the cooling of stampings from alloy 1420,”Tekhnol. Legk. Splav., No. 4, 29–30 (1992).
Author information
Authors and Affiliations
Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 7, pp. 31–35, July, 1998.
Rights and permissions
About this article
Cite this article
Shneider, G.L. Stability of supersaturated solid solution of aluminum — Lithium alloy 1470. Met Sci Heat Treat 40, 294–298 (1998). https://doi.org/10.1007/BF02474896
Issue Date:
DOI: https://doi.org/10.1007/BF02474896