Industrial and Perspective Casting Alloys

Glazoff, Michael V.; Khvan, A.; Zolotorevsky, Vadim S.; Белов, Н. А.; Dinsdale, Alan

doi:10.1016/b978-0-12-811805-4.00005-5

Cited by 16 publications

(34 citation statements)

References 95 publications

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“…The extremely high cooling rate during ACZ alloy solidification caused the formation of a favorable microstructure (Figure 2a) characterized by small size of dendritic cells, fine eutectic particles of Ca-containing phases and full dissolution of Zr in Al solid solution. The measured average size of the dendritic cells is~4 µm (Figure 2b) which, according to other studies [22,29,30], corresponds to a cooling rate of~10 4 K/s. Calcium-bearing eutectic particles corresponding to the quaternary eutectic (Al) + Al 4 Ca + Al 10 CaFe 2 + Al 2 CaSi 2 [26] are detected in the form of thin veins located along the boundaries of the aluminum dendritic cells.…”

Section: Characterization Of As-cast Structuresupporting

confidence: 80%

“…Earlier [26], the structure of this phase diagram in the range of Al-Ca alloys (concentration of Ca much higher than Fe and Si) was reviewed but other fields (with small Ca content) were not studied. Using the calculation in the Thermo-Calc software [31], as well as the results of previously published works [22,[24][25][26]30,32] and additional experiments, we proposed structures of the Al-Ca-Fe-Si system in the aluminum corner including distribution of phases in the solid state…”

Section: Discussionmentioning

confidence: 99%

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Structure and Properties of Ca and Zr Containing Heat Resistant Wire Aluminum Alloy Manufactured by Electromagnetic Casting

Белов

Akopyan

Короткова

et al. 2021

Metals

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Experimental aluminum alloy containing 0.8% Ca, 0.5% Zr, 0.5% Fe and 0.25% Si (wt.%), in the form of a long-length rod 12 mm in diameter was manufactured using an electromagnetic casting (EMC) technique. The extremely high cooling rate during alloy solidification (≈104 K/s) caused the formation of a favorable microstructure in the ingot characterized by a small size of the dendritic cells, fine eutectic particles of Ca-containing phases and full dissolution of Zr in Al the solid solution. Due to the microstructure obtained the ingots possess high manufacturability during cold forming (both drawing and rolling). Analysis of the electrical conductivity (EC) and microhardness of the cold rolled strip and cold drawn wire revealed that their temperature dependences are very close. The best combination of hardness and EC in the cold rolled strip was reached after annealing at 450 °C. TEM study of structure evolution revealed that the annealing mode used leads to the formation of L12 type Al3Zr phase precipitates with an average diameter of 10 nm and a high number density. Experimental wire alloy has the best combination of ultimate tensile strength (UTS), electrical conductivity (EC) (200 MPa and 54.8% IACS, respectively) and thermal stability (up to 450 °C) as compared with alloys based on the Al–Zr and Al– rare-earth metal (REM) systems. In addition, it is shown that the presence of calcium in the model alloy increases the electrical conductivity after cold forming operations (both drawing and rolling).

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Section: Characterization Of As-cast Structuresupporting

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Structure and Properties of Ca and Zr Containing Heat Resistant Wire Aluminum Alloy Manufactured by Electromagnetic Casting

Белов

Akopyan

Короткова

et al. 2021

Metals

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“…Phase composition presented in the Supplementary Table 1 is consistent with previous work on the 4032 alloy, 30 and also with the phase composition of multicomponent Al-Si piston alloys. 33 One should note that the Mg, Si, and Cu content in the fcc (Al) is consumed not only by Mg 2 Si phase but also by the eutectic (Si) and Fe-and Ni-bearing phases, which were observed in the BSD images presented in Figs. 2 and 3.…”

Section: Extruded and Heat-treated Microstructurementioning

confidence: 86%

“…Although the nonhomogenized material shows a slightly lower elongation, it still has a ductility acceptable for piston application, with overall better properties than in the as-cast material. 33…”

Section: Machinability and Tensile Propertiesmentioning

confidence: 99%

Comparative Analysis of Structure and Properties of Nb-B Inoculated Direct Chill Cast AA4032 Alloy Extruded from As-Cast and Homogenized Conditions

Barekar

Skalicky

Wang

et al. 2022

JOM

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Al-Si wrought piston alloys can lack properties due to inefficient grain refining. A novel Al-Nb-B grain refiner was introduced some time ago, but has still not been assessed in industry for wrought alloys. This paper describes the first trial of Al-Ni-B addition and its impact on the full-scale manufacturing, structure, and properties of the AA4032 products extruded with and without billet homogenization. It is shown that Nb-B inoculation gives opportunities not only to have a refined as-cast structure but also a more homogenous distribution of the solute. In contrast, homogenization drives nucleation and coarsening of the Mg2Si phase that is retained during further extrusion and heat treatment also affecting the precipitation and properties. It was observed that non-homogenized specimens perform better during machining and tensile testing compared to homogenized specimens. The results are supported by electron microscopy investigations of microstructure formation during different steps in downstream processing.

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“…Fine dispersoids are formed due to alloying with rare-earth (RE) and transition metals (TM), such as Zr, Sc, Mn, Cr, etc. Nanoscale dispersoids are precipitated during thermomechanical treatment from a supersaturated by TM/RE aluminum based solid solution [ 31 , 32 , 33 , 34 ]. Dispersoids cause Zener pinning effect and stabilize grain size [ 35 , 36 , 37 , 38 ].…”

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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Industrial and Perspective Casting Alloys

Cited by 16 publications

References 95 publications

Structure and Properties of Ca and Zr Containing Heat Resistant Wire Aluminum Alloy Manufactured by Electromagnetic Casting

Structure and Properties of Ca and Zr Containing Heat Resistant Wire Aluminum Alloy Manufactured by Electromagnetic Casting

Comparative Analysis of Structure and Properties of Nb-B Inoculated Direct Chill Cast AA4032 Alloy Extruded from As-Cast and Homogenized Conditions

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

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