Microstructural Master Alloys Features of Aluminum-Erbium System

Article Chemistry, Physical

Influence of Er content on microstructural evolution and mechanical properties of Al-2Fe alloy

Yahong Liang et al.

Summary: The addition of Er can refine the microstructure of Al-2Fe alloy, decrease the spacing between alpha-Al grains and reduce the length of Al3Fe phase, ultimately improving the mechanical properties of the alloy.

JOURNAL OF ALLOYS AND COMPOUNDS (2022)

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Article Materials Science, Multidisciplinary

Correlation between precipitates evolution and mechanical properties of Al-Sc-Zr alloy with Er additions

Li Liu et al.

Summary: The study investigates the correlation between precipitates evolution and mechanical properties of Al-Sc-Zr alloy with Er additions during isothermal ageing. Results show that Er additions significantly improve hardness by increasing the nucleation rate of Al-3(Er,Sc,Zr) precipitates, leading to a higher density of fine nanoparticles. First-principles calculations demonstrate energetically favored solute-solute interactions, rationalizing the observed precipitate structure and formation mechanism.

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY (2022)

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Article Chemistry, Physical

Effect of Zr and Er on the microstructure, mechanical and electrical properties of Al-0.4Fe alloy

Yaping Kong et al.

Summary: The study on the influence of Zr and Er elements in Al-0.4Fe alloy shows that they can inhibit recrystallization, improve the morphology of Al3Fe particles, refine grains, and enhance the strength and electrical conductivity of the alloy. Among the four alloys tested, Al-0.4Fe-0.2Er alloy is selected as the best choice considering the combination of strength and electrical conductivity.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

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Article Chemistry, Physical

Evolution of microstructure and mechanical properties influenced by nanosized precipitates during rolling deformation

Wei Qian et al.

Summary: Through severe plastic deformation of 6111Al-Er alloy, significant enhancement in performance can be achieved, including increased yield strength, ultimate tensile strength, and elongation. This is mainly attributed to the synergistic strengthening effect induced by fine grain strengthening and Orowan strengthening mechanisms. By systematically calculating the competitive relationship between driving force and restraining force, the mechanism of this synergistic strengthening effect is revealed.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

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Article Thermodynamics

Phase equilibria investigation of the Al-Ni-Er ternary system at 600 °C and 700 °C

Fenyan Zhao et al.

Summary: Phase equilibria of the Al-Ni-Er ternary system were experimentally investigated at 600 degrees C and 700 degrees C, revealing the discovery of new ternary compounds and the solid solubility ranges of several compounds. Additionally, it was verified that CaCu5-ErNi5 forms a continuous solid solution with a maximum Al solubility of 33.33 at.%.

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY (2021)

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Article Energy & Fuels

Modeling of Heavy-Oil Flow with Regard to Their Rheological Properties

Ilia Beloglazov et al.

Summary: With the depletion of traditional energy resources, heavy-oil production has been increasing, requiring consideration of the heavy-oil pumping mode. Mathematical models and experiments were used to determine the rheological properties of heavy oil for simulation studies using CFD methods. Research methodology is based on CFD approach with experimental confirmation of results.

ENERGIES (2021)

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Article Materials Science, Multidisciplinary

Coarsening kinetics and strengthening mechanisms of core-shell nanoscale precipitates in Al-Li-Yb-Er-Sc-Zr alloy

Yang Wang et al.

Summary: Core-shell nanoparticles in Al-Li alloy were formed through double-aging treatment, controlling the precipitation and coarsening process at different temperatures. The coarsening was found to be controlled by interface reactions, with Orowan bypass strengthening as the operative mechanism at lower temperatures.

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY (2021)

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Article Green & Sustainable Science & Technology

Mineral Resource Depletion Assessment: Alternatives, Problems, Results

Tatiana Ponomarenko et al.

Summary: The study focuses on the depletion and assessment of non-renewable natural resources, particularly mineral and energy resources, within the framework of sustainable development. It emphasizes the importance of mineral resource depletion assessment for resource-based economies. Through a case study and methodology development, the study provides theoretical support for evaluating the social impact of ceasing the use of profitable mineral reserves.

SUSTAINABILITY (2021)

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Article Engineering, Manufacturing

Hot compression and industrial extrusion characteristics of an as-cast Al-10Sr master alloy

Zhen Zhang et al.

Summary: The addition of Al-Sr master alloy can significantly improve the mechanical properties and castability of Al-Si-based alloys by modifying the structure of eutectic silicon. The size of Al4Sr phases plays a key role in Sr-modification. Optimized processing parameters and refinement mechanisms for Al4Sr phases during plastic deformation were studied through hot compression and industrial extrusion of an as-cast Al-10Sr master alloy. The flow behavior and deformation activation energy of the alloy were characterized, and the refining effects of Al4Sr phases were demonstrated under different processing conditions. Overall, the study provides insights into the mechanisms of Al4Sr phase refinement during plastic forming processes.

JOURNAL OF MANUFACTURING PROCESSES (2021)

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Article Engineering, Marine

Research of the Influence of Marine Residual Fuel Composition on Sedimentation Due to Incompatibility

Radel Sultanbekov et al.

Summary: The article presents a laboratory method for determining compatibility and stability of marine residual fuels to reduce sediment formation, providing quantitative characteristics of sediment activity during mixing. The study identified the influence of n-paraffins and asphaltenes on sedimentation activity, and developed a nomogram based on experimental data for practical use. The research results allow for determination of incompatibility and preservation of fuel quality.

JOURNAL OF MARINE SCIENCE AND ENGINEERING (2021)

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Article Materials Science, Multidisciplinary

Influence of Ti/C mass ratio on the microstructure of Al-Ti-C master alloy and refinement effect on pure aluminum

Ying Dong et al.

Summary: Al-Ti-C master alloys were fabricated using self-propagating high-temperature synthesis (SHS), and the increase in Ti/C mass ratio resulted in better grain refinement of industrial pure aluminum. Specifically, a Ti/C mass ratio of 4:1 showed optimal refining performance with TiC particles and rod-shaped Al3Ti.

RESULTS IN PHYSICS (2021)

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Article Chemistry, Multidisciplinary

Mineral and Technological Features of Magnetite-Hematite Ores and Their Influence on the Choice of Processing Technology

Nadezhda Nikolaeva et al.

Summary: Analysis of current technical solutions for processing iron ores reveals that high-grade ores undergo metallurgical processing, while low-grade ores require beneficiation to obtain high-quality concentrates. Mineralogical studies show that hematite is the main iron-bearing mineral, and iron in the ore mainly exists in the trivalent form.

ACS OMEGA (2021)

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Article Chemistry, Physical

High damping capacity of Al-40Zn alloys with fine grain and eutectoid structures via Yb alloying

Wei Wang et al.

Summary: Rare-earth microalloying was used to improve the microstructure of high-Zn aluminum casting alloys. The addition of Yb successfully refined the alpha-Al grain and alpha + eta eutectoid structures in the Al-40Zn alloys. The 0.3Yb alloy exhibited optimal damping capacity and mechanical properties due to its fine microstructure.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

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Article Nanoscience & Nanotechnology

The effect of grain refinement and precipitation strengthening induced by Sc or Er alloying on the mechanical properties of cast Al-Li-Cu-Mg alloys at elevated temperatures

Xuejian Zhang et al.

Summary: The addition of Scandium and Erbium to Al-Li-Cu-Mg alloy affects the microstructure evolution and mechanical performance at elevated temperatures, with Scandium showing a more significant refining effect on grain size compared to Erbium. Both rare elements facilitate the precipitation density of composite particles in the aged alloys, with Scandium also promoting the precipitation of plate-like S/S' phase during aging. The improvement of elevated-temperatures mechanical properties in Erbium-containing alloy is mainly attributed to larger grain size and precipitation of composite particles.

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING (2021)

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Article Geochemistry & Geophysics

Selective Disintegration Justification Based on the Mineralogical and Technological Features of the Polymetallic Ores

Tatiana Aleksandrova et al.

Summary: The study aimed to demonstrate the possibility of selective disintegration of polymetallic ores by investigating the interrelation and mutual influence of mineralogical-geochemical features, textural-structural, and technological properties. Through experimental and theoretical investigations, as well as research on crushing using different types of crushers, it was possible to substantiate the possibility of selective disintegration for polymetallic ores, leading to increased efficiency and reduced energy costs in the crushing stage.

MINERALS (2021)

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Article Chemistry, Multidisciplinary

Production of Isotropic Coke from Shale Tar at Various Parameters of the Delayed Coking Process

Maxim Yu Nazarenko et al.

Summary: This paper presents the results of studies on the production of coke at different excess pressures with delayed coking of shale tar obtained by pyrolysis of oil shale, analyzing properties such as absolute density, volatile substances yield, ash content, and total porosity. The microstructure of the resulting coke was analyzed using X-ray diffraction and scanning electron microscopy (SEM), confirming an isotropic structure. In addition, the fractional composition of gasoline and gas oil fractions obtained from the delayed coking of shale resin was also analyzed.

ACS OMEGA (2021)

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Article Economics

Involving small and medium-sized mining industry businesses in mining waste processing in the Russian Federation

Marina Nevskaya et al.

Summary: The processing of mining waste can be cost-effective and environmentally friendly, but in Russia's Murmansk Region, there are few projects due to excessive regulatory requirements hindering small- and medium-sized businesses. Time and high commodity prices are critical resources for SMEs, as the quality of mining waste deteriorates over time.

MINERAL ECONOMICS (2021)

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Article Metallurgy & Metallurgical Engineering

Thermal stability and precipitate microstructures of Al-Si-Mg-Er alloy

Yi He et al.

Summary: The research showed that Er has an impact on the thermal stability and precipitation behavior of the Al-Si-Mg alloy, resulting in smaller average size of precipitates. When natural aging is combined with artificial aging, similar mechanical properties are observed in the alloy.

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA (2021)

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Article Geosciences, Multidisciplinary