Effect of Low Additions of Y, Sm, Gd, Hf and Er on the Structure and Hardness of Alloy Al – 0.2% Zr – 0.1% Sc

Pozdnyakov, A. V.; Osipenkova, Alexandra A.; Попов, Д. А.; Махов, С. В.; Напалков, В. И.

doi:10.1007/s11041-017-0050-z

Cited by 54 publications

(20 citation statements)

References 21 publications

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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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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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“…Rare earth elements have important practical significance for the improvement and optimization of the microstructure and properties of alloys. In recent years, people have improved the various properties of aluminum alloys by adding rare earth elements such as Yb [8], Ce, La [9], Sm, Y, Nd, Gd, Er [10][11][12][13], and microalloying of aluminum alloys has been extensively studied. Subbaiah et al [14] first added rare earth element Sc to aluminum alloys in 1971 to improve the strength of aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, during the deformation process, the aging precipitation S′ phases help to improve the mechanical properties of the alloy by hindering the movement of dislocations or defects, especially at high temperatures. Wu et al [13] studied the effect of the addition of rare earth Sm on the microstructure and corrosion properties of AZ292 magnesium alloy. It was found that in the process of solution-ageing, rare earth Sm could promote the precipitation of β-Mg 17 Al 12 phase in the grains, inhibiting the precipitation of the phase on the grain boundaries, so that the β phase became finer and the distribution was more uniform, which significantly reduced the macroscopic corrosion current between the phase and the substrate, so that the addition of an appropriate amount of rare earth Sm could improve the corrosion resistance of the alloy.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ce addition on microstructure, mechanical properties and corrosion behavior of Al-Cu-Mn-Mg-Fe alloy

Tian

Chen

et al. 2020

Mater. Res. Express

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The effects of rare earth Ce on the microstructure, mechanical properties and corrosion behavior of Al-Cu-Mn-Mg-Fe alloys were investigated by means of microstructure analysis, tensile test and electrochemical corrosion test. The research shows that the Al-Cu-Mn-Mg-Fe alloy after low temperature heat treatment mainly contains the S (Al 2 CuMg) phase, the T (Al 20 Cu 2 Mn 3 ) phase, the Al 6 (Mn, Fe) phase and the Al 7 Cu 2 Fe phase, and the rare earth Ce makes the alloy form the new rare earth phase Al8Cu4Ce. The appearance of this phase has a significant refinement effect on the Al 6 (Mn, Fe) phase. Compared with Ce-free, the yield strength and tensile strength of Al-Cu-Mn-Mg-Fe alloy with 0.254 ωt% Ce increased by 7% and 15%, respectively, and the elongation increased from 3.1% to 4.8%. It also has better corrosion resistance, which is represented by the decrease of corrosion current density and positive shift of corrosion potential in Tafel measurement in solutions of different concentrations, and the increase of corrosion impedance in electrochemical impedance spectroscopy test, especially the corrosion current density was reduced by 6.06 μA cm −2 in 3.5% NaCl solution.

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“…The high conductivity requirement imposes strong limitations on the maximum concentration of the doping elements in the alloys, limiting the maximum concentrations of Mg, Sc, Zr, and Fe that all drive up electrical resistance linearly even in small concentrations [39]. This has motivated numerous researchers to actively search for doping elements that could effectively substitute for the expensive scandium in the doping of aluminum alloys [3,7,40,41,42,43] and for optimal ratios between Sc and Zr in aluminum alloys [8,18,19,27,44,45,46].…”

Section: Introductionmentioning

confidence: 99%

Study of Structure and Mechanical Properties of Fine-Grained Aluminum Alloys Al-0.6wt.%Mg-Zr-Sc with Ratio Zr:Sc = 1.5 Obtained by Cold Drawing

et al. 2019

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The thermal stability of a fine-grained (FG) aluminum wire has been studied in Al-0.6Mg-Zr-Sc alloys with various scandium and zirconium contents. Specimens were obtained by induction casting followed by cold deformation. The FG alloys have been demonstrated to have high thermal stability of the structure and properties due to the annealing pretreatment (320 °C, 2 h, before drawing), which results in deposition of Al3(ScxZr1−x) intermetallic particles. It has been determined that following a prolonged annealing treatment (400 °C, 100 h), the alloys retain a uniform fine-grained structure with an average grain size of 2.4–2.8 μm whereas their microhardness measures 405–440 MPa.

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Effect of Low Additions of Y, Sm, Gd, Hf and Er on the Structure and Hardness of Alloy Al – 0.2% Zr – 0.1% Sc

Cited by 54 publications

References 21 publications

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

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

Effect of Ce addition on microstructure, mechanical properties and corrosion behavior of Al-Cu-Mn-Mg-Fe alloy

Study of Structure and Mechanical Properties of Fine-Grained Aluminum Alloys Al-0.6wt.%Mg-Zr-Sc with Ratio Zr:Sc = 1.5 Obtained by Cold Drawing

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