Designed layered materials based on sheets of aluminum-lithium alloys and fiberglass in the designs of new generation aircrafts

Каблов, Е. Н.; Антипов, В.В.; Girsh, R. I.; Serebrennikova, N.Yu.; Коновалов, А. А.

doi:10.36652/0042-4633-2020-12-46-52

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Vestnik Mashinostroeniya 2020

DOI: 10.36652/0042-4633-2020-12-46-52

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Designed layered materials based on sheets of aluminum-lithium alloys and fiberglass in the designs of new generation aircrafts

Е. Н. Каблов¹,

В.В. Антипов²,

R. I. Girsh³

et al.

Abstract: The developments in the field of layered aluminum-fiberglass using sheets of aluminum-lithium alloys and layers of fiberglass are presented. A set of basic indicators is considered depending on the stacking of layers in the structures of aluminum-fiberglass СИАЛ. The tests show the advantages of structures using laminated hybrid materials over structures made of traditional aluminum alloys. Keywords: laminated hybrid material, aluminum-fiberglass СИАЛ, GLARE, aluminum-lithium alloy, structurally similar specim… Show more

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Investigation into the impact of phase composition on the thermal expansion and mechanical properties of Al–Cu–Li alloys

Ashmarin,

Gordeeva,

Betsofen

et al. 2023

Izv.VUZ. Tsvet. Met.

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The study employed high-temperature X-ray diffraction, quantitative phase analysis, and tensile mechanical property measurements to investigate the relationship between coefficient of thermal expansion (CTE) and phase composition, along with the average yield strengths and Young's moduli of Al–Cu–Li alloys in three different sheet orientations: 1441, V-1461, V-1469, V-1480, and V-1481. The copper content within the solid solution and the mass fractions of the T1(Al2CuLi) and δ′(Al3Li) phases were determined using an innovative technique based on measuring the lattice distance of the α solid solution, Vegard's law, and balance equations for the elemental and phase compositions of the alloys. It was observed that as the lithium-to-copper ratio in the alloys increased from 0.32 to 1.12, the proportion of the δ′(Al3Li) phase increases from 6.3–8.4 wt.% in V-1481, V-1480 and V-1469 alloys to 16.0–17.3 wt.% in 1441 and V-1461 alloys, accompanied by a decrease in the T1(Al2CuLi) phase from 5 to 1 wt.%. This led to an increase in the Young's modulus from 75 to 77 GPa due to higher overall proportion of intermetallic compounds and a reduction in yield strength from 509 to 367 MPa due to the decrease in the T1 phase. This decrease in yield strength resulted from the fact that the hardening effect of the T1 phase was 3–4 times greater than that of the δ′ phase, and this couldn't be offset by an increase in the total intermetallic compound proportion. The observed increase in Young's modulus indicated that the elastic properties of the intermetallic phases were similar, and the rise in the total fraction of intermetallic compounds compensated for the decrease in the T1 phase. Furthermore, it was demonstrated that СTE, as measured based on the thermal expansion of the solid solution, also depended on the characteristics of the intermetallic phases present in the alloy. This expanded the potential interpretations of СTE measurement results.

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Investigation into the impact of phase composition on the thermal expansion and mechanical properties of Al–Cu–Li alloys

Ashmarin,

Gordeeva,

Betsofen

et al. 2023

Izv.VUZ. Tsvet. Met.

View full text Add to dashboard Cite

show abstract

Thermal cycling effect on a structure of multilayer composite material made of 08kp and 08Kh18N10 steels

Khudnev

Plokhikh

Bolshakova

et al. 2021

EJSI

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The article researches the effect of five cycles of heating to a temperature of 1000 °C and two cycles of heating to a temperature of 1100 °C on the structure of a layered composite material consisted of 100 alternating layers of 08kp and 08Kh18N10 steels (one layer thickness is ~22 μm). As a result of the nickel and chromium diffusion during thermocycling, the thickness of the layers changed and an interlayer with a structure different from the structure of neighboring layers was formed. Heating to 1100 °C also has led to a partial disarrangement of the layered material structure. It was found that the real diffusion path of alloying elements during heat treatment significantly exceeds the calculated one, and chromium atoms are redistributed between the layers of the material much more actively than nickel atoms.

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Designed layered materials based on sheets of aluminum-lithium alloys and fiberglass in the designs of new generation aircrafts

Cited by 2 publications

References 0 publications

Investigation into the impact of phase composition on the thermal expansion and mechanical properties of Al–Cu–Li alloys

Investigation into the impact of phase composition on the thermal expansion and mechanical properties of Al–Cu–Li alloys

Thermal cycling effect on a structure of multilayer composite material made of 08kp and 08Kh18N10 steels

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