The influence of precipitation on plastic deformation in a high Mg-containing AlMgZn-based crossover alloy: Slip localization and strain hardening

Zhang, Xiuzhen; Yang, Chao; Meng, Lei; Chen, Zhenghao; Gong, Wu; Sun, Binhan; Zhao, Shiteng; Zhang, Deliang; Li, Yue; Zhou, Dengshan

doi:10.1016/j.ijplas.2024.103896

Cited by 8 publications

(2 citation statements)

References 97 publications

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“…A novel approach to developing crossover alloys based on using aluminum alloy scraps was presented [9]. The crossover alloys combine the properties of mixed alloys of different series [10][11][12][13][14][15][16][17]. A novel crossover Al-5.64Mg-5.43Zn-0.51Cu alloy with ultra-high strength was developed based on Al-Mg/Al-Zn-Mg-(Cu) systems [13].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Phase Composition of Novel Crossover Al-Zn-Mg-Cu-Zr-Y(Er) Alloys with Equal Zn/Mg/Cu Ratio and Cr Addition

Glavatskikh,

Barkov,

Gorlov

et al. 2024

Metals

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The effect of 0.2%Cr addition on the structure, phase composition, and mechanical properties of the novel cast and wrought Al-2.5Zn-2.5Mg-2.5Cu-0.2Zr-Er(Y) alloys were investigated in detail. Chromium is distributed between primary crystals (5.7–6.8%) of the intermetallic phase and the aluminum solid solution (0.2%) (Al). The primary crystals contain for the main part Cr, Ti, Er(Y). The experimental phase composition is in good correlation with the thermodynamic computation data. The micron-sized solidification origin phases (Al8Cu4Er(or Y) and Mg2Si) and supersaturated (Al) with nano-sized Al3(Zr,Ti) and E (Al18Mg3Cr2) precipitates are presented in the microstructure of the novel alloys after solution treatment. The nucleation of η (MgZn2) (0.5%), S (Al2CuMg) (0.4%), and T (Al,Zn,Mg,Cu) (8.8%) phase precipitates at 180 °С, providing the achievement of a maximum hardness of 135 HV in the Al2.5Zn2.5Mg2.5CuYCr alloy. The corrosion potential of the novel alloy is similar to the Ecor of the referenced alloy, but the corrosion current density (0.68–0.98 µA/sm2) is still significantly lower due to the formation of E (Al18Mg3Cr2) precipitates and S phase precipitates of the aging origin, in addition to the T phase. The formation of E (Al18Mg3Cr2) precipitates under the solution treatment provides a lower proportion of recrystallized grains (2.5–5% vs. 22.4–25.1%) and higher hardness (110 HV vs. 85–95 HV) in the Cr-rich alloys compared to the referenced alloys. Solution treated, hot and cold rolled, recrystallized, water quenched and aged at 210 °С alloys demonstrate an excellent microstructure stability and tensile properties: YS = 299–300 MPa, UTS = 406–414 MPa, and El. = 9–12.3%.

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Section: Introductionmentioning

confidence: 99%

Microstructure and Phase Composition of Novel Crossover Al-Zn-Mg-Cu-Zr-Y(Er) Alloys with Equal Zn/Mg/Cu Ratio and Cr Addition

Glavatskikh,

Barkov,

Gorlov

et al. 2024

Metals

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“…When the strain concentration reaches a certain degree, obvious localized strain features appear, resulting in the formation of multiple localized strain bands. [4][5][6] The continuous development of these bands ultimately leads to the instability and failure of the rock mass. Therefore, the study of localized strain is of great significance.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental study of strain localization phenomenon based on phase transition theory

Yan,

Wang,

Liu

et al. 2024

Physics of Fluids

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In the study of large-scale localized strain features, localized strain can lead to energy release and seismic effects. From the macroscopic process of localized strain, it is found that localized deformation is accompanied by structural weakening, which is due to phase changes in rocks. The phase change corresponds to the secondary phase transition process in physics. The present study illustrates this phenomenon from the perspective of secondary phase transition theory in statistical physics, combining the localized strain features on a large scale. Theoretical analysis and experimental studies were carried out using three brittle rocks, including marble, granite and red sandstone. First, two perturbation methods, i.e., Krylov–Bogoliubov method and Poincare method, are used to calculate the higher-order control equations in analytical model. The influences of control equation coefficients on the strain localization process are analyzed. Then the uniaxial compression tests are carried out on the three rocks to record the strain process. Finally, the theoretical and experimental results are compared to analyze the strain localization phenomenon. The comparison results show that both the Krylov–Bogoliubov solution and the Poincare solution in the analytical model can well describe the evolution characteristics of localized strain. It indicates that the theoretical model is valid and has high accuracy. The Poincare method better simulates the nonlinear phenomenon of strain localization. The present study provides a new theoretical method to better understand the strain localization phenomenon.

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Low cycle fatigue behavior of MAR-M247 nickel-based superalloy from 500 to 900 °C: Analysis of cyclic response, microstructure evolution and failure mechanism

Liu,

Wang,

Jiang

et al. 2024

International Journal of Fatigue

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The influence of precipitation on plastic deformation in a high Mg-containing AlMgZn-based crossover alloy: Slip localization and strain hardening

Cited by 8 publications

References 97 publications

Microstructure and Phase Composition of Novel Crossover Al-Zn-Mg-Cu-Zr-Y(Er) Alloys with Equal Zn/Mg/Cu Ratio and Cr Addition

Microstructure and Phase Composition of Novel Crossover Al-Zn-Mg-Cu-Zr-Y(Er) Alloys with Equal Zn/Mg/Cu Ratio and Cr Addition

Theoretical and experimental study of strain localization phenomenon based on phase transition theory

Low cycle fatigue behavior of MAR-M247 nickel-based superalloy from 500 to 900 °C: Analysis of cyclic response, microstructure evolution and failure mechanism

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