Effect of Impurities on the Phase Composition and Properties of a New Alloy of the Al–Y–Er–Zr–Sc System

Pozdnyakov, A. V.; Barkov, R. Yu.

doi:10.1007/s11015-019-00796-w

Cited by 19 publications

(7 citation statements)

References 23 publications

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“…In this connection, aluminum alloys modifications of Al-Mg-Si system alloys [11,16,[28][29][30][31][32][33][34][35][36] (commercial alloys of 6XXX series [28,32,33,36,[38][39][40], Al-Mg-Si-Zr alloys [30], Al-Mg-Si-(Ni,Fe) + (Sc,Zr) [37], Al-Mg-Si-Cu [41], et al), conductor alloys Al-Fe [8,[42][43][44] and novel aluminum alloys multidoped with various rare earth elements (REEs) and transition metals (TMs) -zirconium, scandium, hafnium, yttrium, etc. are being developed extensively [45][46][47][48][49][50][51][52][53][54][55][56].…”

Section: Introductionmentioning

confidence: 99%

Effect of Er, Si, Hf, Nb Additives on the Thermal Stability of Microstructure, Electrical Resistivity and Microhardness of Fine-Grained Aluminum Alloys Al-0.25%Zr

Нохрин¹,

Nagicheva²,

Чувильдеев³

et al. 2022

Preprint

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The conductor aluminum alloys Al-0.25wt.%Zr doped additionally with Х = Er, Si, Hf, and Nb were the objects of investigations. The fine-grained microstructure in the alloys was formed by Equal Channel Angular Pressing and Rotary Swaging. The thermal stability of the microstructure, specific electrical resistivity, and microhardness of the novel conductor aluminum alloys was investigated. The mechanisms of nucleation of the Al3(Zr,X) secondary particles during annealing the fine-grained aluminum alloys were determined using Jones-Mehl-Avrami-Kolmogorov equation. Using Zener equation, the dependencies of the mean secondary particle sizes on the annealing time were obtained on the base of analysis of the data on the grain growth in the aluminum alloys. The secondary particle nucleation during long-time low-temperature annealing (300 оC, 1000 hrs) was shown to go preferentially at the cores of the lattice dislocations. The Al-0.25%Zr-0.25%Er-0.20%Hf-0.15%Si alloy subjected to long-time annealing at 300 оC has the optimal combination of the microhardness and electrical conductivity (59.8%IACS, Hv = 480 ± 15 MPa).

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Section: Introductionmentioning

confidence: 99%

Effect of Er, Si, Hf, Nb Additives on the Thermal Stability of Microstructure, Electrical Resistivity and Microhardness of Fine-Grained Aluminum Alloys Al-0.25%Zr

Нохрин¹,

Nagicheva²,

Чувильдеев³

et al. 2022

Preprint

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“…In this connection, the novel conductor dispersion-hardened Al alloys are being developed intensively. The improved strength and thermal stability in these alloys are provided by the nucleation of Al 3 X nanoparticles where X = Sc, Zr, Er, and other alloying elements [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. The alloying of the Al alloys by Sc is the most efficient [ 16 , 21 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the replacement of Sc by cheaper transition metals and/or REEs (Zr, Er, Hf, etc.) is an important practical task [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Thermal Stability of Microstructure and Mechanical Properties of Bimetallic Fine-Grained Wires from Al–0.25%Zr–(Sc,Hf) Alloys

et al. 2021

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Thermal stability of composite bimetallic wires from five novel microalloyed aluminum alloys with different contents of alloying elements (Zr, Sc, and Hf) is investigated. The alloy workpieces were obtained by induction-casting in a vacuum, preliminary severe plastic deformation, and annealing providing the formation of a uniform microstructure and the nucleation of stabilizing intermetallide Al3(Zr,Sc,Hf) nanoparticles. The wires of 0.26 mm in diameter were obtained by simultaneous deformation of the Al alloy with Cu shell. The bimetallic wires demonstrated high strength and improved thermal stability. After annealing at 450–500 °C, a uniform fine-grained microstructure formed in the wire (the mean grain sizes in the annealed Al wires are 3–5 μm). An increased hardness and strength due to nucleation of the Al3(Sc,Hf) particles was observed. A diffusion of Cu from the shell into the surface layers of the Al wire was observed when heating up to 400–450 °C. The Cu diffusion depth into the annealed Al wire surfaces reached 30–40 μm. The maximum elongation to failure of the wires (20–30%) was achieved after annealing at 350 °C. The maximum values of microhardness (Hv = 500–520 MPa) and of ultimate strength (σb = 195–235 MPa) after annealing at 500 °C were observed for the wires made from the Al alloys alloyed with 0.05–0.1% Sc.

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“…Erbium is a prospective alloying element to improve the mechanical properties of pure aluminium [1][2][3][4][5][6][7][8][9][10] and Al-Mg alloys [11][12][13][14][15][16][17] due to the nucleation of L1 2 precipitates after the annealing of as-cast ingots. Zhang et al demonstrated strengthening in the Al-0.045 at.%Er, which was achieved by Al 3 Er precipitate nucleation [1].…”

Section: Introductionmentioning

confidence: 99%

“…Standard silicon impurities in the aluminium have a positive effect in the strengthening effect of the Al-Zr-Sc-Er alloys due to the enhancement of the precipitate density [7,8]. Silicon in combination with Fe impurities decrease hardening due to (AlSiFeEr(Zr)) and (AlSiErY(Zr)) phase formation during solidification of the Al-Y-Er-Zr-Sc alloy [10]. The same strengthening mechanism provides good mechanical properties in the Al-Mg alloys [11][12][13][14][15][16][17], and Er has a positive effect in primary aluminium grain refining [12,14,15,17].…”

Section: Introductionmentioning

confidence: 99%

The Phase Composition and Mechanical Properties of the Novel Precipitation-Strengthening Al-Cu-Er-Mn-Zr Alloy

et al. 2020

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The microstructure, phase composition, and mechanical properties during heat treatment and rolling of the novel Al-5.0Cu-3.2Er-0.9Mn-0.3Zr alloy were evaluated. A new quaternary (Al,Cu,Mn,Er) phase with possible composition Al25Cu4Mn2Er was found in the as-cast alloy. Al20Cu2Mn3 and Al3(Zr,Er) phases were nucleated during homogenization, and θ″(Al2Cu) precipitates were nucleated during aging. The metastable disc shaped θ″(Al2Cu) precipitates with a thickness of 5 nm and diameter of 100–200 nm were nucleated mostly on the Al3(Zr,Er) phase precipitates with a diameter of 35 nm. The hardness Vickers (HV) peak was found after the annealing of a rolled alloy at 150 °C due to strengthening by θ″(A2Cu) precipitates, which have a larger effect in materials hardness than do the softening processes. The novel Al-Cu-Er-Mn-Zr alloy has a yield strength (YS) of 320–332 MPa, an ultimate tensile strength (UTS) of 360–370 MPa, and an El. of 3.2–4.0% in the annealed alloy after rolling condition.

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Effect of Impurities on the Phase Composition and Properties of a New Alloy of the Al–Y–Er–Zr–Sc System

Cited by 19 publications

References 23 publications

Effect of Er, Si, Hf, Nb Additives on the Thermal Stability of Microstructure, Electrical Resistivity and Microhardness of Fine-Grained Aluminum Alloys Al-0.25%Zr

Effect of Er, Si, Hf, Nb Additives on the Thermal Stability of Microstructure, Electrical Resistivity and Microhardness of Fine-Grained Aluminum Alloys Al-0.25%Zr

Investigation of Thermal Stability of Microstructure and Mechanical Properties of Bimetallic Fine-Grained Wires from Al–0.25%Zr–(Sc,Hf) Alloys

The Phase Composition and Mechanical Properties of the Novel Precipitation-Strengthening Al-Cu-Er-Mn-Zr Alloy

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