Effect of Zn/Mg ratio on aging precipitates and mechanical property of high Mg content Al-Mg-Zn alloys with Sc and Zr additions

Huang, Yushen; Sun, Peng; Sun, Linlin; Li, Ya; Zheng, Xiaoyu; Li, Xiwu; Yan, Hongwei; Li, Bo; Liu, Yuling; Du, Yong

doi:10.1016/j.jallcom.2023.173368

Cited by 6 publications

(2 citation statements)

References 61 publications

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“…Despite extensive investigations [26][27][28][29][30], the effect of the shear strain in a wide range of deformation imposed in HPT processes on the microstructure and on the subsequent mechanical properties of several AlZnMg alloys has not been clarified in detail.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution during High-Pressure Torsion in a 7xxx AlZnMgZr Alloy

Ahmed,

Olasz,

Bobruk

et al. 2024

Materials

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A homogenized, supersaturated AlZnMgZr alloy was processed via severe plastic deformation (SPD) using a high-pressure torsion (HPT) technique for different revolutions at room temperature to obtain an ultrafine-grained (UFG) microstructure. The microstructure and mechanical properties of the UFG samples were then studied using transmission electron microscopy (TEM), differential scanning calorimetry (DSC), and tensile and hardness measurements. The main purpose was to study the effect of shear strain on the evolution of the microstructure of the investigated alloy. We found a very interesting evolution of the decomposed microstructure in a wide range of shear strains imposed by HPT. While the global properties, such as the average grain size (~200 nm) and hardness (~2200 MPa) appeared unchanged, the local microstructure was continuously transformed. After 1 turn of HPT, the decomposed UFG structure contained relatively large precipitates inside grains. In the sample processed by five turns in HPT, the segregation of Zn atoms into grain boundaries (GBs) was also observed. After 10 turns, more Zn atoms were segregated into GBs and only smaller-sized precipitates were observed inside grains. The intensive solute segregations into GBs may significantly affect the ductility of the material, leading to its ultralow-temperature superplasticity. Our findings pave the way for achieving advanced microstructural and mechanical properties in nanostructured metals and alloys by engineering their precipitation and segregation by means of applying different HPT regimes.

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Section: Introductionmentioning

confidence: 99%

Microstructure Evolution during High-Pressure Torsion in a 7xxx AlZnMgZr Alloy

Ahmed,

Olasz,

Bobruk

et al. 2024

Materials

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“…The novel Al-Mg-Zn alloys, with higher specific strength than the 2xxx and 7xxx series of aluminum alloys due to increased Mg content and ability to be strengthened through aging heat treatment (Huang et al, 2023), find diverse applications in the fields of ships, marine equipment, aerospace, and automobiles. Because of the significant scatter of fatigue test result, the prediction of aluminum alloy component behavior using fatigue models lacks accuracy.…”

Section: Introductionmentioning

confidence: 99%

Effect of grain orientation distribution on the mechanical properties of Al-7.02Mg-1.78Zn alloys

Chen,

Zheng,

et al. 2024

MMMS

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PurposeDuring the forming process, aluminum alloy sheets develop various types of textures and are subjected to cyclic loading as structural components, resulting in fatigue damage. This study aims to develop polycrystalline models with different orientation distributions and incorporate suitable fatigue indicator parameters to investigate the effect of orientation distribution on the mechanical properties of Al-7.02Mg-1.78Zn alloys under cyclic loading.Design/methodology/approachIn this study, a two-dimensional polycrystalline model with 150 equiaxed grains was constructed based on optical microscope images. Subsequently, six different orientation distributions were assigned to this model. The fatigue indicator parameter of strain energy dissipation is utilized to analyze the stress response and fatigue crack driving force in polycrystalline models with different orientation distributions subjected to cyclic loading.FindingsThe study found that orientation distribution significantly influences fatigue crack initiation. Orientation distributions with a larger average Schmid factor exhibit reduced stress response and lower fatigue indicator parameters. Locations with a larger average Schmid factor experience greater plastic deformation and present a higher risk for fatigue crack initiation. RVE with a single orientation undergoes more rotation to reach cyclic steady state under cyclic loading due to the ease of deformation transfer.Originality/valueCurrently, there are no reports in the literature on the calculation of fatigue crack initiation for Al-Mg-Zn alloys using the crystal plasticity finite element method. This study presents a novel strategy for simulating the response of Al-7.02Mg-1.78Zn materials with different orientation distributions under symmetric strain cyclic loading, providing valuable references for future research.

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Effect of homogenization treatment on microstructure and properties of novel Al-Mg-Zn-Sc-Zr alloys with different Mg/Zn ratios

Yang,

Li,

et al. 2025

Journal of Alloys and Compounds

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Effect of Zn/Mg ratio on aging precipitates and mechanical property of high Mg content Al-Mg-Zn alloys with Sc and Zr additions

Cited by 6 publications

References 61 publications

Microstructure Evolution during High-Pressure Torsion in a 7xxx AlZnMgZr Alloy

Microstructure Evolution during High-Pressure Torsion in a 7xxx AlZnMgZr Alloy

Effect of grain orientation distribution on the mechanical properties of Al-7.02Mg-1.78Zn alloys

Effect of homogenization treatment on microstructure and properties of novel Al-Mg-Zn-Sc-Zr alloys with different Mg/Zn ratios

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