New in-situ Al matrix composites based on Al-Ni-La eutectic

Akopyan, Т. К.; Белов, Н. А.; Наумова, Е. А.; Letyagin, N. V.

doi:10.1016/j.matlet.2019.02.112

Cited by 34 publications

(14 citation statements)

References 9 publications

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“…The widely used hypereutectic silumins (alloys of the Al-Si system) have a number of significant disadvantages, namely, embrittlement, the need for modification during melting, and reduced thermal conductivity. Developed in recent years, the multicomponent eutectic alloys based on the systems such as aluminum-calcium (light, corrosion-resistant), aluminum-cerium and aluminum-lanthanum (heat-resistant), aluminum-nickel (highstrength and heat-resistant) are very promising for practical use [2][3][4][5][6]. These alloys are highly technological in casting, since they have narrow crystallization intervals, and they are easily deformed in the annealed state, despite the large fraction (over 10% by volume) of intermetallic phases in the structure.…”

Section: Introductionmentioning

confidence: 99%

High Strength Al–La, Al–Ce, and Al–Ni Eutectic Aluminum Alloys Obtained by High-Pressure Torsion

et al. 2021

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A comparative analysis of the effect of high-pressure torsion (HPT) on the microstructure and tensile properties of the Al–10% La, Al–9% Ce, and Al–7% Ni model binary eutectic aluminum alloys is carried out. An HPT of 20-mm diameter specimens in as-cast state was carried out under constrained conditions, at room temperature, pressure P = 6 GPa, and number of turns N = 5. It is shown that the formation of nano- and submicrocrystalline structures and the refinement of eutectic particles in aluminum alloys simultaneously provide a multiple increase in strength while maintaining a high plasticity margin. This combination of properties has been achieved for the first time for severely deformed binary aluminum eutectics. The relationship between the type of eutectic particles, the structure formation process and the mechanical properties of the aluminum alloys has been established. The thermal stability of severely deformed aluminum alloys at heating up to 200 °C has been studied.

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Section: Introductionmentioning

confidence: 99%

High Strength Al–La, Al–Ce, and Al–Ni Eutectic Aluminum Alloys Obtained by High-Pressure Torsion

et al. 2021

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“…Such coarse particles may precipitate during heterogenization treatment from a solid solution supersaturated by Mg, Zn, Si, Cu [ 14 , 16 , 23 ], and precipitate during solidification due to alloying with eutectic forming elements, such as Ni, Fe, Mn, Ce [ 24 , 25 , 26 , 27 ]. Nickel is a promising alloying element for increasing the superplasticity of Al-based alloys [ 24 , 26 , 27 , 28 , 29 , 30 ]. The homogeneous distribution of the coarse Al 3 Ni particles with a near-spherical morphology is formed in the alloys’ sheets during a simple thermomechanical treatment [ 26 , 27 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

A High-Strain-Rate Superplasticity of the Al-Mg-Si-Zr-Sc Alloy with Ni Addition

et al. 2021

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The current study analyzed the effect of Ni content on the microstructure and superplastic deformation behavior of the Al-Mg-Si-Cu-based alloy doped with small additions of Sc and Zr. The superplasticity was observed in the studied alloys due to a bimodal particle size distribution. The coarse particles of eutectic origin Al3Ni and Mg2Si phases with a total volume fraction of 4.0–8.0% and a mean size of 1.4–1.6 µm provided the particles with a stimulated nucleation effect. The L12– structured nanoscale dispersoids of Sc- and Zr-bearing phase inhibited recrystallization and grain growth due to a strong Zener pinning effect. The positive effect of Ni on the superplasticity was revealed and confirmed by a high-temperature tensile test in a wide strain rate and temperature limits. In the alloy with 4 wt.% Ni, the elongation-to-failure of 350–520% was observed at 460 °C, in a strain rate range of 2 × 10−3–5 × 10−2 s−1.

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“…Aluminum alloys are still one of the main constructional materials in aircraft industry, electrical engineering and other industries due to their combination of properties [1][2][3]. Modern trends of researchers' activities are connected, first of all, with the creation of new materials by change in chemical composition [4][5][6], improvement or search for new methods of processing materials [7][8][9][10]. In the field of materials science and metal forming in the last decades much attention is given to methods of severe plastic deformation (SPD) which allow significantly to increase the mechanical properties of the material due to ultrafine grained (UFG) or nanostructures [11,12].…”

Section: Introductionmentioning

confidence: 99%

Analysis of radial-shear rolling process parameters of aluminum alloys based on FEM modeling

Gamin

Koshmin

2020

MATEC Web Conf.

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This article presents the features of temperature change at different deformation-velocity parameters of radial-shear rolling process. Based on modeling the maps of temperature and strain rates distribution and zone of intensive heating are obtained. It is shown that with the elongation ratio μ≥1.5, the deformation heating increases more intensively at lower heating temperatures of the workpiece. The rods are obtained from 1050A alloy (Al99.5 %) with mechanical properties (UTS ~ 111 MPa, YS ~ 109 MPa, δ ~ 15%), reflecting the partially recrystallized structure.

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New in-situ Al matrix composites based on Al-Ni-La eutectic

Cited by 34 publications

References 9 publications

High Strength Al–La, Al–Ce, and Al–Ni Eutectic Aluminum Alloys Obtained by High-Pressure Torsion

High Strength Al–La, Al–Ce, and Al–Ni Eutectic Aluminum Alloys Obtained by High-Pressure Torsion

A High-Strain-Rate Superplasticity of the Al-Mg-Si-Zr-Sc Alloy with Ni Addition

Analysis of radial-shear rolling process parameters of aluminum alloys based on FEM modeling

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