Structure and properties of sheets from workable aluminium alloy V-1341 of Al–Mg–Si system

Клочков, Г Г; Ovchinnikov, Victor; Klochkova, Yu. Yu.; Romanenko, V. A.

doi:10.18577/2307-6046-2017-0-12-3-3

Cited by 7 publications

(3 citation statements)

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“…The analysis of the patent studies, scientific and engineering literature, and studies of the alloys of the system in question [8,9,[11][12][13][14][15] allowed choosing ten experimental compositions of the new Al-Mg-Si alloy (Table 1). The main alloying elements are magnesium, silicon, copper, and manganese.…”

Section: Resultsmentioning

confidence: 99%

“…Another advantage of the alloys of this alloying system is their enhanced workmanship, which allows performing cold bending and punching operations and also avoiding additional re-quenching of assembled structural elements usually made from duralumins in the annealed state because of the low formability of sheets from such alloys as D16chT and 1163T [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16].…”

Section: Materials For Aviation and Space Technologymentioning

confidence: 99%

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Structure and Properties of Sheets from New Al–Mg–Si Alloy V-1381

Селиванов

Antipov

Oglodkova

et al. 2021

Inorg. Mater. Appl. Res.

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A new series 6xxx Al-Mg-Si alloy is developed with grade V-1381. The influence of the composition and modes of heat treatment on the mechanical and corrosion properties of sheets with a thickness of 1 and 3 mm manufactured at the All-Russian Scientific Research Institute of Aviation Materials (VIAM) is investigated. The average properties of the sheets are as follows: the ultimate tensile strength is σ B = 410 MPa, the yield strength is σ 0.2 = 360 MPa, the elongation is δ = 11.5%, the fatigue crack growth rate is (dl/dN) = 0.59 mm/kcycle at ΔK = 18.6 MPa m 1/2 , the intergranular corrosion is IGC ≤ 0.15 mm, and the exfoliation corrosion (EXFC) is 4 points. It is found out that the sheets are structurally recrystallized, the main strengthening phase is the matrix-coherent β'(Mg 2 Si) phase evenly distributed with a high density across the volume of grains. Another observed process is the heterogeneous origin of the β′ phase on dislocations and dispersoids. The dispersoids observed in the tested specimens have various morphologies. The grain boundaries have emission-free zones 15-20 nm in width. The temperatures and heat values of phase transformations in ingots and sheets are determined, including the measurement of liquidus and solidus points. The sheet weldability is evaluated by automatic argon-arc welding, and critical strain rate V cr of the weld metal during crystallization is determined at which this metal is not covered with cracks. A laser welding mode has been developed to ensure optimal formation of the geometric parameters of the weld.

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Section: Resultsmentioning

confidence: 99%

Section: Materials For Aviation and Space Technologymentioning

confidence: 99%

Structure and Properties of Sheets from New Al–Mg–Si Alloy V-1381

Селиванов

Antipov

Oglodkova

et al. 2021

Inorg. Mater. Appl. Res.

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“…The alloy was supposed to be an alternative to Al -Mg alloys with a lower strength, which are not vacuum-tight at a less than 2-mm thickness of the sheets in welded units operating under pressure [3] and are susceptible to formation of strain bands under cold tensile deformation. It has been shown that sheets from alloy V-1341 are well adaptable to cold forming due to their fine-grained structure and uniform distribution of the orientations of grains [4].…”

Section: Introductionmentioning

confidence: 99%

Commercial Production of High-Technology Alloy V-1341 of the Al – Mg – Si System with Calcium Addition

Клочков¹,

Grushko²,

Ovsyannikov³

et al. 2015

Met Sci Heat Treat

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Production of ingots and commercial-size sheets from an Al -Mg -Si-base alloy V-1341 with calcium addition is described. Their structure, phase composition and mechanical properties are studied. It is shown that calcium enters primarily phases Al x Si y Ca and Al x Si y Mg z Ca of variable composition. INTRODUCTIONThe interest in alloys of the Al -Mg -Si system in aircraft engineering and machine building is growing from year to year due to the combination of strength and corrosion properties, high process ductility and good weldability [1].A new promising medium-strength aluminum alloy V-1341 of the Al -Mg -Si system with an additive of 0.05 -0.15% Ca has been designed for the production of complex-shape articles with enhanced air-tightness for the aircraft and automotive industries from cold-deformed sheets [2]. The alloy was supposed to be an alternative to Al -Mg alloys with a lower strength, which are not vacuum-tight at a less than 2-mm thickness of the sheets in welded units operating under pressure [3] and are susceptible to formation of strain bands under cold tensile deformation. It has been shown that sheets from alloy V-1341 are well adaptable to cold forming due to their fine-grained structure and uniform distribution of the orientations of grains [4].The positive effect of calcium on the structure, mechanical properties, adaptability to manufacture and weldability of some aluminum alloys has been shown in [5 -8]. The mechanism of its action is determined by the alloying system, is quite complex and not quite understandable, which requires further study [9]. In the recent years a calcium additive has been introduced not only into aluminum alloys, both deformable and castable [10,11], but also into magnesium alloys [12 -14].The aim of the present work was to study the effect the addition of calcium on the structure and properties of alloy V-1341 used for commercial production of ingots and sheets. METHODS OF STUDYWe studied ingots with cross section 300´1100 mm from alloy V-1341 with different calcium contents (0.03 wt.% Ca in alloy 1 and 0.12 wt.% Ca in alloy 2 ) and from alloy AV (alloy 3 ) of the same system without calcium [15,16]. The ingots were cast by the semi-continuous method into a sliding mold; in all the cases bars from Al -5% Ti -1% B were introduced into the feed pan.The ingots were annealed at 380 -420°C for 2 h and used to make test pieces for differential thermal analysis. The results of the analysis were used to choose the temperature for homogenizing the ingots. Transverse templates were cut from the homogenized ingots to study the zonal segregation, the microstructure, and the mechanical properties.Alloy 2 was used to make sheets with a thickness of from 0.8 to 3 mm by hot and cold rolling. The sheets were quenched in water after heating at 525°C in a saltpeter bath with a hold of from 10 to 40 min and then subjected to artificial aging. Metallographic analysis of the ingots and of the sheets was performed with the help of a light microscope in polarized light using laps after col...

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