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Results are given for a study of the mechanical properties of aluminum alloy AA2219 after thermomechanical treatment by different regimes, including different (in form and degree) cold plastic deformation. [ABSTRACT FROM AUTHOR]

Phase transformations in aluminum alloys 1424 and V-1461 are investigated. Special features of the structure of the δ′-phase in the initial stages of aging of alloy 1424 are determined with the help of x-ray diffraction analysis and transmission electron microscopy. The earlier plotted diagram of aging-induced phase transformations (AIPT) of alloy 1424 is amended. The temperature and time ranges of the existence of the phases are determined and an AIPT diagram is plotted for alloy V-1461. It is shown that the maximum strength properties of alloy V-1461 are implemented in phase domains (δ′ + θ′ + $$ {{T^{\prime}}_1} $$ + S′) and (δ′ + $$ {{T^{\prime}}_1} $$ + S′). This makes it possible to obtain various phase compositions corresponding to the required combination of properties and substantiates the use of multistage aging modes. [ABSTRACT FROM AUTHOR]

Fracture surfaces of aluminum alloys VAD23, AK6, V95, 01911, 1420, 1430, 1440, 1451 are studied after different variants of aging. Common features of formation of fractures are determined depending on the modes of heat treatment, conditions of deformation and presence of impurities in the aluminum alloys. Efficiency of the use of fractography for estimating the working capacity of the aluminum alloys is demonstrated. [ABSTRACT FROM AUTHOR]

Curves of flow of alloys of the Al – Mg, Al – Zn and Al – Cu systems are obtained for the temperature range of 200 – 500°C at deformation rates from 0.1 to 30 sec –1. A mathematical model of the dependence of the flow stress of the alloys on the temperature and rate parameters of the deformation is designed, which makes it possible to compute flow stresses with an error of 5%. [ABSTRACT FROM AUTHOR]

The effect of Fe and Ni on the parameters of superelasticity of alloy Al – 11% Zn – 3%Mg – 0.8% Cu – 0.3% Zr is studied. It is shown that addition of 1% Ni and 0.6% Fe raises the volume fraction of second-phase particles from 6 to 14%, and this provides a more dispersed and partially recrystallized structure. As a result, the flow stress during superplastic deformation decreases by a factor of 1.5 – 2.0 and the elongation increases from 360 – 420% to 500 – 660% at deformation rates ranging within 2 × 10 −3 – 1 × 10 −2 sec −1. [ABSTRACT FROM AUTHOR]

The methods of light and scanning electron microscopy and x-ray phase and thermal analysis are used to study the effect of the special features of the production process on the characteristics of the grain structure and super-elasticity of sheets from alloys based on the Al - Cu - Mg - Fe - Ni system. It is shown that the use of annealing in saltpeter before the superplastic deformation improves the superplasticity parameters of the alloys. [ABSTRACT FROM AUTHOR]

Modes for heat treatment for homogenizing the cast structure and raising the processibility of alloy AA2014 are determined by empirical methods with the use of light microscopy. The time and temperature of annealing, which determine minimization of dendritic segregation and dissolution of particles of secondary phase, are chosen for a typical commercial ingot. Homogenization at 500°C for 26 h is chosen for alloy AA2014 (the Russian counterpart is AK8) with a mean grain size of 200 μm. [ABSTRACT FROM AUTHOR]

The effect of different modes of three-stage aging on the structure and properties of hot-deformed semiproducts (pressed shapes and rolled plates) from high-strength aluminum alloy V96Ts-3 of the Al – Zn – Mg – Cu system is studied with the aim of optimizing the hardening heat treatment. Amode of three-stage aging convenient for commercial production and ensuring hot-deformed semiproducts from alloy V96Ts-3 with high strength at the state T1 level in combination with satisfactory corrosion resistance corresponding to state T2 is suggested. [ABSTRACT FROM AUTHOR]

The effect of heat treatment modes and of the degree of plastic deformation on the texture and properties of sheets from aluminum alloy AMg10 is considered. The behavior of the parameters of anisotropy of the sheets is considered depending on the degree of cold plastic deformation and on the heat treatment mode. [ABSTRACT FROM AUTHOR]

The effect of heat treatment on the physicochemical and technological properties of aluminum-based powder materials containing rare-earth elements is investigated. Powder composites are produced by mechanical alloying in ball mills. Recommendations for molding and heat treatment conditions are given. [ABSTRACT FROM AUTHOR]

The structure and phase composition of commercial magnesium deformable alloy MA14 are studied as a function of the process parameters. The effect of heat treatment on the changes in the structure, phase composition, and mechanical and corrosion properties of the alloy is considered. Conditions of formation of ZrZn2 Laves phase are analyzed. The influence of the Laves phase on the properties of the alloy is determined. The necessity for performing homogenizing annealing of cast preforms from alloy MA14 in a two-stage mode for raising the adaptability of the alloy to manufacture is confirmed. [ABSTRACT FROM AUTHOR]

The microstructure and high-temperature mechanical properties of cast alloy Ti-43% Al- X (Nb, Mo, B) belonging to the new class of β-hardening γ-TiAl + α2-Ti3Al alloys is investigated. The alloy in the cast state and after a heat treatment promoting structure refinement is studied by the methods of light and scanning electron microscopy, microscopic x-ray spectrum analysis, and differential thermal analysis. The mechanical characteristics are evaluated in tensile tests in air at 1000 and 1100°C. [ABSTRACT FROM AUTHOR]

The effect of laser treatment modes on the structure and properties of high-strength castable aluminum alloy MVTU-6 of the Al-Si-Cu-Cd system developed at the Bauman Moscow State Technical University by a group of researchers headed by I. I. Sidorin is studied. [ABSTRACT FROM AUTHOR]

The effect of annealing on preliminary treatment of aluminum alloy 1421 by low-energy laser pulses is studied. It is shown that after annealing the action of the preliminary laser treatment on the time of the start of fusion under very intense laser treatment disappears. [ABSTRACT FROM AUTHOR]