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ISSN 2664-2441 (Online)
ISSN 2073-9583 (Print)

Control the properties of high-strength aluminum alloy systems Al-Zn-Mg-Cu to prevent premature failure

Metalozn. obrobka met., 2019, Tom 90, No 2, cc.44-51
https://doi.org/10.15407/mom2019.02.044

O.V. Abolikhina, Candidate of Technical Science (Ph.D.), hellenab17@gmail.com
S.M. Chernega*, Doctor of Technical Science, Professor of Metal Science and Heat Treatment, smchernega@ukr.net

Antonov State Company, Kyiv
*National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv

UDC 621.002.3:621.89
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Summary

High-strength aluminum alloys of V93T1, V93hpT3, 1933T3, made of forged or stamped semi-finished products, along with duralumin, are the main material for the design elements of airframes. The work on improving the service characteristics of the alloy B93 has been under way for more than six decades since its inception due to the optimization of the composition, the introduction of new alloyed microadditives and the use of step-by-step heat treatment This allowed the creation of an improved alloy of 1933, which replaced the AK6 and B93 alloys. However, as shown by the experience of using the alloy in 1933, in the conditions of long-acting alternating loads and aggressive media, it is still sensitive to stress concentrators and is prone to fatigue and corrosion fatigue. The paper shows the history of the development of high-strength alloys of the Al-Zn-Mg-Cu system used in aircraft of different generations.

Keywords: aluminium alloys, strength, plasticity, corrosion resistance, airplane glider.

References

1.Opredeleniye skorosti rosta treshchiny u alyuminiyevogo splava В93пчТ1v razlichnykh sredakh pri dlitelnom staticheskom nagruzhenii (Determination of the crack growth rate for the В93пчТ1 aluminum alloy in various media during long-term static loading.). Tekhnicheskiy otchet. "VIAM", 1991, 32 s. [in Russian]

2. Fridlyander I.N. Alyuminiyevyye deformiruyemyye konstruktsionnyye splavy (Aluminum wrought structural alloys), Moskva: Metallurgiya, 1979, 208 s. [in Russian].