Obtaining Al–Zr-Hf wire using electromagnetic casting, combined rolling-extrusion, and drawing

Voroshilov, Denis Sergeevich; Motkov, M. M.; Sidelnikov, S. B.; Sokolov, Ruslan; Durnopyanov, Alexander; Константинов, И. Л.; Беспалов, В. М.; Bermeshev, T. V.; Гудков, И. С.; Voroshilova, Marina Vladimirovna; Mansurov, Yu. N.; Berngardt, Viktor A.

doi:10.1016/j.ijlmm.2022.04.002

Cited by 8 publications

(11 citation statements)

References 59 publications

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“…Doping Al-Zr alloys with hafnium is also known to accelerate the formation of secondary Al3Zr particles but higher temperatures are required [40,43,69]. In our opinion, doping Al-Zr-Sc alloy with Hf during heating leads to secondary Al3(Hf,Zr) particles that are formed at higher temperatures compared to Al3(Sc,Zr) and Al3Sc particles.…”

Section: Discussionmentioning

confidence: 88%

“…This study focuses on Al-Zr-Sc, Al-Zr-Hf, Al-Zr-Yb alloys as well as alloys simultaneously alloyed with several doping elements. Precipitation of Al3(Zr,Sc) and Al3(Zr,Hf) secondary particles in Al-Zr-(Sc,Hf) alloys is still more intensive at lower temperatures compared to Al3Zr in Al-Zr alloys [15,40,43,45,69]. Therefore, during low-temperature heating, it is possible to ensure precipitation of a larger volume fraction of Al3(Zr,X) secondary particles compared to that of Al3Zr particles.…”

Section: Introductionmentioning

confidence: 99%

“…High stability of a UFG microstructure in aluminum alloys at lower heating temperatures allows for stable properties of thin wires operating at 200-250 °C [7,8,43,68,69]. Besides, the stability of a nonequilibrium UFG microstructure at low temperatures will enable the low-temperature superplasticity effect in UFG aluminum alloys [70][71][72][73][74][75][76][77]81,82].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Sc, Hf, and Yb Additions on Superplasticity of a Fine-grained Al-0.4%Zr Alloy

Нохрин¹,

Gryaznov²,

Shotin³

et al. 2022

Preprint

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The research was undertaken to study the way deformation behaves in ultrafine-grained (UFG) conducting Al-Zr alloys doped with Sc, Hf, and Yb. All in all, 8 alloys were studied with zirconium partially replaced by Sc, Hf, and/or Yb. Doping elements (X = Zr, Sc, Hf, Yb) in the alloys total 0.4 wt.%. The choice of doping elements is conditioned by possible precipitation of Al3X particles with L12 structure while annealing these alloys. Such particles provide higher thermal stability of a nonequilibrium UFG microstructure. Initial coarse-grained samples were obtained by induction casting. The UFG microstructure in the alloys was formed by Equal Channel Angular Pressing (ECAP) at 225°C. Superplasticity tests were carried out at temperatures ranging from 300 to 500 °C and strain rates varying between 3.310-4 and 3.310-1 s-1. The highest values of elongation to failure are observed in Sc-doped alloys. A UFG Al-0.2%Zr-0.1%Sc-0.1%Hf alloy has maximum ductility: at 450 °C and a strain rate of 3.310-3 s-1, relative elongation to failure reaches 765%. At the onset of superplasticity, stress–strain curves are characterized by a stage of homogeneous strain and a long stage of localized plastic flow. The dependence of homogeneous strain (eq) on test temperature in UFG Sc-doped alloys is increasing uniformly, which is not the case for other UFG alloys with eq(T) dependence peaking at 350-400 оС. Strain rate sensitivity coefficient of flow stress m is small and does not exceed 0.26-0.3 at 400-500 °C. In UFG alloys containing no scandium, m coefficient is observed to go down to 0.12-0.18 at 500 оС. It has been suggested that lower m values are driven by intensive grain growth and pore formation in large Al3X particles, which develop specifically at the ingot crystallization stage.

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Section: Discussionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Sc, Hf, and Yb Additions on Superplasticity of a Fine-grained Al-0.4%Zr Alloy

Нохрин¹,

Gryaznov²,

Shotin³

et al. 2022

Preprint

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“…Er [53,54,56,[59][60][61]63,66,71,76], Hf [25,53,54,57,63,70,76], Yb [53,55,62,65,66,73], and Y [54,58,64,66,67,72,74,75] is studied thoroughly, including the combined effect of several doping elements on the kinetics of precipitation and growth of particles with L12 structure in aluminum alloys. Some works are worth mentioning as they demonstrate that precipitation of L12 particles in new alloys can develop in line with the discontinuous precipitation mechanism [51,61,[77][78][79][80][81][82][83].…”

Section: Introductionmentioning

confidence: 99%

“…Some works are worth mentioning as they demonstrate that precipitation of L12 particles in new alloys can develop in line with the discontinuous precipitation mechanism [51,61,[77][78][79][80][81][82][83]. The microstructure and mechanical properties of fine-grained aluminum alloys, simultaneously doped with several REEs and TMs, were studied in detail in [21][22][23][24][25][26][27][28][29][30][31][32]34,43,52,54,[56][57][58]60,61,63,[65][66][67][68][69][70][72][73][74]76].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sc:Zr Ratio on Superplastic Behavior of Ultrafine-grained Al-6%Mg-Sc-Zr Alloys

Чувильдеев¹,

Gryaznov²,

Shotin³

et al. 2022

Preprint

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Al-6%Mg-Sc-Zr alloys with the total ratio of Sc + Zr = 0.32 wt.% make up the target of this research. The content of scandium and zirconium varied with an increment of 0.02%. The alloys were produced by induction casting. Their ultrafine-grained (UFG) microstructure was formed with Equal Channel Angular Pressing (ECAP). Such cast alloys have a homogeneous macrostructure formed by small equiaxed grains in the central part of the ingot and columnar crystals along the edges of the cross section. After ECAP, the average grain size in the alloy specimens is 0.5–1 µm. The average grain size does not depend on the ratio of Sc and Zr in these alloys. Superplasticity tests were performed at temperatures ranging from 300 to 500 °C and at a strain rate varying between 3.3·10-3 and 3.3·10-1 s-1. UFG Al-6%Mg-0.20%Sc-0.12%Zr and Al-6%Mg-0.18%Sc-0.14%Zr alloys exhibit the highest superplasticity. It was suggested that changes in Sc:Zr ratio affect spatial distribution and composition of the following precipitating particles: Al3Sc, Al3Zr, Al3(ScxZr1-x). An increase in Zr concentration is shown to reduce the susceptibility of UFG alloys to cavitation fracture.

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Obtaining welding wire from alloy 1580 by technology including the method of combined rolling-extrusion

Konstantinov,

Baranov,

Zenkin

et al. 2024

Appl. Phys. A

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Obtaining Al–Zr-Hf wire using electromagnetic casting, combined rolling-extrusion, and drawing

Cited by 8 publications

References 59 publications

Effect of Sc, Hf, and Yb Additions on Superplasticity of a Fine-grained Al-0.4%Zr Alloy

Effect of Sc, Hf, and Yb Additions on Superplasticity of a Fine-grained Al-0.4%Zr Alloy

Effect of Sc:Zr Ratio on Superplastic Behavior of Ultrafine-grained Al-6%Mg-Sc-Zr Alloys

Obtaining welding wire from alloy 1580 by technology including the method of combined rolling-extrusion

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