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Kolobnev, N. I.

doi:10.1023/a:1021207921163

Cited by 25 publications

(7 citation statements)

References 1 publication

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“…Another effective way of improving the structure is additional alloying of the alloy, which can affect both the grain structure and the decomposition of the supersaturated solid solution. Our studies of the effect of severe plastic deformation (SPD) on the structural and phase transformations were performed both on the standard alloy 1450 and, mainly, on the 1450 alloy modified additionally with Sc and Mg additives (Tables 1 and 2) [5][6][7].…”

Section: Methodsmentioning

confidence: 99%

“…The scientific-creative association between (i) the Federal State Unitary Enterprise "All-Russian Research Institute of Aviation Materials (VIAM)" and (ii) the aircraft design, metallurgical, and aircraft manufacturing enterprises is still in operation. Aluminum alloys developed at the Institute VIAM under the scientific supervision of I. N. Friedlander were used in the designs of all Soviet and Russian aircraft, including passenger and transport An-22, An-124 Ruslan, An-148, An-225 Mriya, Il-86, Il-96, Tu-144, Tu-154,Tu-204, MS-21, Superjet, Yak-42, amphibious aircraft Be-103 and Be-200, strategic bombers Tu-16, Tu-95, Tu-160, fighters MiG-15, MiG-23, MiG-29, Su-30, Su-34, Su-35, Su-37 Yak-141, and others, as well as solid-and liquid-fuel short-and medium-range and intercontinental missiles [5][6][7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Of course, a separate important global trend of modern development was the research on the development of ultralow-weight Al-Li-based alloys, which has included the study of both model binary and alloyed master-alloys and commercially employed alloys [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Multicomponent Aging Al-Li-Based Alloys of the Latest Generation: Structural and Phase Transformations, Treatments, Properties, and Future Prospects

et al. 2022

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An overview of modern material science problems is presented for ultralightweight high-modulus commercial Al-Li-based alloys in historical retrospect. Numerous particular examples of the Soviet and Russian aviation whose various designs were made of these alloys confirm their successful innovative potential. The key regularities of multicomponent alloying are discussed for the master alloys and modern commercial Al-Li-based alloys of the latest generation; the features typical of their microstructures, phase composition, and properties formed during aging are analyzed. The main mechanisms of phase formation are generalized for standard thermal and thermomechanical treatments. Recent original achievements have been obtained in designing of unique structural and phase transformations in these commercial alloys by means of methods of severe plastic deformations followed by heat treatment and storage. Using the example of three Russian commercial alloys of last generation, the basic principles of creating and controlling an ultrafine-grained structure, the origin and growth of stable nanophases of various types and chemical composition that determine the physicomechanical properties of alloys are established.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multicomponent Aging Al-Li-Based Alloys of the Latest Generation: Structural and Phase Transformations, Treatments, Properties, and Future Prospects

et al. 2022

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“…According to the Al-Cu-Sc phase diagram, a thermally stable W phase (AlCuSc) was formed, which is highly dependent on the Cu content and the minor Sc addition in Al-Cu-Li alloys [13]. When Sc is introduced into Al-Cu-Li alloys with a low content of Cu or without Cu, the Sc atoms tend to combine with Al atoms to form A1 3 Sc particles wrapped by δ' (Al 3 Li) particles and exist as Al 3 (Sc, Zr) composite particles [14]. For some Al-Cu-Li alloys with higher Cu/Li ratios (Cu/Li > 2.8), such as 1469 [15,16], 2070 [17] and the new Al-3.8Cu-1.2Li alloy [18], the addition of minor Sc exerts some negative function on the strength.…”

Section: Introductionmentioning

confidence: 99%

Effect of Rolling Reduction on Microstructures and Mechanical Properties of Sc-Containing Al-3.2Cu-1.5Li Alloy

Wang

Kan

et al. 2023

Metals

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The effects of various rolling reductions (64.7%, 72.1%, 81.4% and 88.2%) on the microstructures and mechanical behaviors of Sc-containing Al-3.2Cu-1.5Li-based alloys were experimentally investigated through XRD, SEM (equipped with EBSD), TEM and the tensile test. The results showed that the grains of hot-rolled and T6-treated alloys are mainly dominated by substructure features, and the addition of the trace Sc element can obviously impede the static and dynamic recrystallization due to the formation of fine and stable nano-Al3(Sc, Zr) particles. Additionally, the combined effects of fine grains, dispersion, substructure and precipitation strengthening make the alloys with a rolling reduction of 81.4% possess higher tensile properties. With an increase in the rolling reduction, the tensile strength of the alloys increases first and then decreases, while the elongation gradually increases and then reaches a plateau, which was ascribed to the variation in the grain size and substructure features.

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“…Furthermore, alloying of Al-Li alloys with scandium (Sc) causes substantial grain refinement which increases strength characteristics, improves the weldability, improves high-temperature stability, and affects the nature and rate of decomposition of the supersaturated solid solution [14,15].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Effect of Heat Treatment on the Microstructure and Hardness of Aluminum-Lithium Alloys

Radan,

Songmene,

Zedan

et al. 2023

Materials

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In this study, the effects of heat treatment on the microstructure and strength (micro-hardness) of an aluminum–lithium (Al-Li) base alloy containing copper (Cu) and scandium (Sc) were investigated, with a view to enhancing the alloy performance for aerospace applications. The heat treatment conditions were investigated to understand the precipitation behavior and the mechanisms involved in strengthening. Aging was carried out at temperatures of 130 °C and 150 °C for aging times of 1 h, 2.5 h, 5 h, 10 h, 15 h, 25 h, 35 h, and 45 h at each temperature for Al-Li alloy and at 160 °C, 180 °C, and 200 °C for aging times of 5 h, 10 h, 15 h, 20 h, 25 h, and 30 h at each temperature for Al-Li-Cu and Al-Li-Cu-Sc alloys. The investigation revealed that both solution heat treatment and artificial aging had a notable impact on strengthening the hardness of the alloy. This effect was attributed to the characteristics of the precipitates, including their type, size, number density, and distribution. The addition of copper (Cu) and scandium (Sc) was observed to have an impact on grain size refinement, while Cu addition specifically affected the precipitation behavior of the alloy. It led to remarkable changes in the number density, size, and distribution of T1 (Al2CuLi) and θ’ (Al2Cu) phases. As a result, the hardness of the alloy was significantly improved after the addition of Cu and Sc, in comparison with the base Al-Li alloy. The best heat treatment process was determined as: 580 °C/1 h solution treatment +150 °C/45 h artificial aging for Al-Li alloy and 505 °C/5 h solution treatment +180 °C/20 h artificial aging for Al-Li-Cu and Al-Li-Cu-Sc alloys.

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Cited by 25 publications

References 1 publication

Multicomponent Aging Al-Li-Based Alloys of the Latest Generation: Structural and Phase Transformations, Treatments, Properties, and Future Prospects

Multicomponent Aging Al-Li-Based Alloys of the Latest Generation: Structural and Phase Transformations, Treatments, Properties, and Future Prospects

Effect of Rolling Reduction on Microstructures and Mechanical Properties of Sc-Containing Al-3.2Cu-1.5Li Alloy

Investigating the Effect of Heat Treatment on the Microstructure and Hardness of Aluminum-Lithium Alloys

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