Microstructure, superplasticity, and mechanical properties of Al–Mg–Er–Zr alloys

Котов, А. Д.; Mochugovskiy, A.G.; Mosleh, Ahmed O.; Кищик, А. А.; Rofman, O.V.; Mikhaylovskaya, A. V.

doi:10.1016/j.matchar.2022.111825

Cited by 23 publications

(6 citation statements)

References 76 publications

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“…Al-6%Mg alloys are doped with scandium and zirconium to increase strength, ductility, corrosion resistance, and weldability . Some commercial and novel Al-Mg-(Sc,Zr) alloys shows higher superplastic characteristics [36,[39][40][41][42][43][44][45][46][47][48][49][50][51][52]. Industrial Al-6%Mg-(Sc,Zr) alloys enjoy an optimal combination of performance characteristics but their active commercialization is constrained by high prices for scandium and Sc-doped alloys.…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays much effort is taken to find ways to replace scandium with cheaper rare earth elements (REE) and transition metals (TM) [23][24][32][33][34]38,43,53]. The effect of Zr [23][24][25]29,30,[32][33][34][35]39,51,52,53,69,70],…”

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%

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…To solve this problem, Al-Zr alloys are applied with zirconium concentration up to 0.4-0.6 wt.%, which are made using special ultrafast crystallization technologies [68,69,[71][72][73][74][75]. Second, more efficient way is additional microdoping of Al-Zr alloys by the elements (most often -Er [45,49,50,56,[76][77][78][79][80][81][82][83], Hf [49,56,75,77], Y [49,50,[84][85][86][87], Yb [50,[88][89][90], et al) providing accelerated decomposition of solid solution at lower annealing temperatures. Note that additional doping allows avoiding the intermittent decomposition of solid solution, which are observed in Al-Zr alloys often [91][92][93][94][95].…”

Section: Introductionmentioning

confidence: 99%

“…In the present work, we investigated the effect of Er, Hf, Nb, and Si additives on the thermal stability of microstructure in Al-Zr alloys. The choice of Er and Hf was caused by positive effect of these ones on the acceleration of nucleation of Al3Zr secondary particles in Al-Zr alloys [56,75,[78][79][80][81][82][83]. Doping of aluminum with niobium allows forming the Al-Nb particles with D023 structure and also allows controlling the character of distribution of Al3Zr particles and forming the AlZrNb secondary particles additionally [96].…”

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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High-reduction radial shear rolling of aluminum alloy bars using custom-calibrated rolls

Gamin,

Galkin,

Koshmin

et al. 2023

Int J Mater Form

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Microstructure, superplasticity, and mechanical properties of Al–Mg–Er–Zr alloys

Cited by 23 publications

References 76 publications

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

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

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

High-reduction radial shear rolling of aluminum alloy bars using custom-calibrated rolls

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