Creation of large-scale thin-walled welded panels of high strength from aluminum-magnesium alloys for construction of high-speed vessels of a new type for operation in the Arctic

A new high-strength material has been developed – large-scale thin-walled welded panels made of aluminum-magnesium alloy 1565ch. Its use, combined with modern achievements in the field of strength and aerohydrodynamics, made it possible to create a multifunctional economy skeg-type hovercraft “Haska 10” with unique operational capabilities.

ATLAS 5005

Atlas 5005 is a non-heat-treatable, aluminum-magnesium alloy. This alloy has been widely adopted for anodized architectural panels. With correct rolling practices and composition controls, Atlas 5005 architectural sheet provides exceptionally high-quality surfaces after anodizing. The architectural products produced from this alloy are used on many high-end building projects to meet customer specifications for uniformity and color match. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Al-482. Producer or source: Atlas Steels.

Experimental study of the thermophysical properties for aluminum-magnesium alloy AMg3

The thermal diffusivity (a), the thermal coefficient of linear expansion (α), the isobaric heat capacity (cp ) and the fusion enthalpy (ΔH) of aluminum-magnesium alloy AMg3 were investigated by laser flash method, dilatometric method and method of differential scanning calorimetry in the temperature range of 300–773…1000 K. The thermal conductivity (λ) has been calculated from the measurement results. The estimated errors of the obtained data were 2–5%, 3–5%, 2–3% and (1.5–2.0)⋅10-7 K-1 for a, λ, cp and α, respectively. Approximation equations and a table of reference values for the temperature dependence of the studied properties have been obtained.

WATER DROPLET EVAPORATION IN A CHAMBER ISOLATED FROM THE EXTERNAL ENVIRONMENT

Establishing the characteristics of the self-assembly of micron and sub-micron particles when colloidal solution droplets evaporate from solid surfaces is an urgent problem. This is explained by the possibility of using these structures obtained by droplet technologies to create and optimize the production of direct and indirect liquid cooling devices, electronic and sensor working boards, current-conducting coatings, optical crystals, and chemo sensors. The method used in this study for processing of metals and alloys by laser radiation is prospective for controlling the processes at the liquid/gas/solid interface. This article aims to analyze the effect of laser processing of the widely used in the industry aluminum-magnesium alloy on the formation of a layer of particles during the droplet evaporation of colloidal solutions. The samples’ surfaces were processed by two methods: polished by tumbling and nanosecond laser pulses. The geometric parameters of the droplets of colloidal solutions evaporating from the samples’ surfaces were determined by the shadow method. To process the obtained shadow images, the Young — Laplace method was used. Using a scanning electron microscope, the authors have received the images of the particles’ layers formed due to the droplet evaporation of colloidal solutions. The experimental studies reveal the effect of texture formed on aluminum-magnesium alloy sample on the morphology of the layer of polystyrene nanoparticles during the droplet evaporation of colloidal solutions. Due to the self-assembly of particles, solid ring-like sediments are formed, which are elongated under the action of the capillary force parallel to the motion vector of the laser beam (when creating the texture). When the solvent evaporated from the solution droplet on the textured surface, in addition to the rings, a homogeneous layer of polystyrene particles was formed. This refers to the droplet evaporation of the solution. The results show that with an increase in the concentration of particles in the solution, the sizes of radial cracks on the rings formed due to particle deposition increase. There were no cracks on the rings at a relatively low volume concentration of particles.