Designing lightweight multicomponent magnesium alloys with exceptional strength and high stiffness

Gu, Zi; Zhou, Yunxuan; Qi-wu, Dong; He, Gaoxiang; Cui, Jie; Tan, Jun; Chen, X.H.; Jiang, Bin; Pan, Fusheng; Eckert, Jürgen

doi:10.1016/j.msea.2022.143901

Cited by 21 publications

(3 citation statements)

References 67 publications

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“…The approach relies on databases as well as available data to researchers. The approaches have good prediction accuracy and have already been applied to successfully produce new high entropy alloys with good stability, including magnesium alloys [19], [20], [20], [21]. The issue of vacancies that is a problem with this kind of prediction can be addressed to take care of transformations due to diffusion.…”

Section: Numerical Analysismentioning

confidence: 99%

Untitled

2023

MSEJ

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Magnesium alloys are high potential materials for application in the aerospace and automotive industries due to their lightweight properties. They can help to lower dead weight and fuel consumption to contribute to sustainability and efficiency. It is possible to achieve high specific strength and high stiffness of the alloys by varying compositions of alloying elements. Applications of magnesium are limited due to its low strength and relatively low stiffness. This research focuses on a recipe of multi component alloys of magnesium with varied percentages of Mg, Al, Cu, Mn and Zn obtained from literature and optimizes the percentage compositions to obtain for high specific strength and specific stiffness. Relationships among percentage constituents of the alloy components are examined in Matlab R2022b using multiple linear regression. Optimization is achieved using genetic algorithm to determine the specific strengths and stiffness. The resulting optimal alloy component percentages by weight are used for microstructure simulation of thermodynamic properties, diffusion and phase transformations of proposed alloy is done in MatCalc software version 6.04. Results show potential for improved mechanical properties resulting from disordered structure in the high entropy magnesium alloy. Future research should focus on production and characterization of the proposed alloy.

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Section: Numerical Analysismentioning

confidence: 99%

Untitled

2023

MSEJ

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“…In recent years, magnesium alloys have attracted widespread attention due to their excellent properties, such as their high strength-to-weight ratio, high specific stiffness, good thermal conductivity, and low density (1.3~1.9 g/cm 3 ; density: 2/3 of aluminum alloys and 1/4 of steel) [1][2][3]. These properties make magnesium alloys have a broad development prospect for the automotive, aerospace, military, 3C (computer, communication, and consumer electronics), and electronics industries [4][5][6][7]. However, due to the HCP structure of magnesium alloys and limited openable slip system at room temperature, they lead to some disadvantages, such as poor plasticity at room temperature, which greatly limits the widespread application of magnesium alloys [8].…”

Section: Introductionmentioning

confidence: 99%

Thermal Deformation Behavior and Microstructural Evolution of Multicomponent Mg-Li-Zn-Al-Y Alloys under Hot Compression

Yang,

Bai,

et al. 2024

Materials

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High-temperature compression tests on Mg-11.5Li-2.5Zn-0.35Al-0.3Y (in wt.%) were carried out on a Gleeble-3500 thermal simulator. Flow stress and microstructural evolution were analyzed at different temperatures (T = 473 K, 523 K, 573 K, and 623 K) and strain rates (ε = 1 s−1, 0.1 s−1, 0.01 s−1, and 0.001 s−1). On this basis, the constitutive model of the alloy was established using the Arrhenius-type constitutive model, and the thermal processing map of the alloy was drawn based on the DMM (dynamic material modeling) theory. The experimental results show that the flow stress of the Mg-11.5Li-2.5Zn-0.35Al-0.3Y alloy decreases with an increase in temperature and a decrease in strain rate. The grain size increases uniformly with the increase in temperature, while a sudden increase occurs with the decrease in strain rate. The predicted value of the model is compared with the experimental value to verify the correctness of the model, and the correlation coefficient, R = 0.9690, was calculated, which further proves the applicability of the model to the Mg-11.5Li-2.5Zn-0.35Al-0.3Y alloy. This alloy can be safely plastic-deformed 473 K~623 K and 0.001 s−1~1 s−1.

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“…Magnesium alloys are widely acknowledged as the lightest structural metals globally, thereby underscoring their immense potential in future development amid the urgent pursuit of lightweight materials [1,2]. Additionally, magnesium alloys exhibit outstanding machining capabilities [3], high specific strength and stiffness [4], remarkable damping properties [5], and effective electromagnetic shielding capabilities [6]. Consequently, magnesium alloys are often hailed as environmentally friendly engineering materials [7].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation and experimental investigation on friction stir welding of AZ31 magnesium alloy

Yan,

Liu,

Yang

et al. 2024

Mater. Res. Express

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Integrated numerical simulations and experimental investigations were employed to scrutinize the thermal, mechanical, and microstructural transformations of the AZ31 magnesium alloy during the friction stir welding (FSW) process. Especially, the primary focus was on the influence of process parameters such as rotational speed and welding speed on the temperature distribution, grain refinement, and mechanical properties of welded joints in alloys. By employing Deform-3D coupled with the integration of constitutive equations and dynamic recrystallization (DRX) models, the FSW process was investigated. The investigation revealed a significant increase in temperature when the tool's shoulder made contact with the weld, resulting in the substantial accumulation of heat during FSW. Distinctions became apparent between the advancing side (AS) and the receding side (RS), with the AS exhibiting slightly elevated levels of temperature, equivalent stress, strain, and grain size. Specifically, adjustments in the rotational speed of the stirring tool and a reduction in welding speed resulted in larger grain sizes within the alloy. For example, when the rotational speed was set at 1200 rpm and the travel rate was 200 mm/min, the initial grain size of the weld experienced a substantial decrease from 57.8 µm to 8.2 µm. Subsequent experimental verification, considering grain size and microhardness, was carried out to optimize FSW parameters for achieving the desired material properties. The accuracy of simulation results was validated through a meticulous comparison with experimental findings, underscoring the potential of numerical simulation in comprehending and predicting FSW processes.

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Designing lightweight multicomponent magnesium alloys with exceptional strength and high stiffness

Cited by 21 publications

References 67 publications

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Thermal Deformation Behavior and Microstructural Evolution of Multicomponent Mg-Li-Zn-Al-Y Alloys under Hot Compression

Numerical simulation and experimental investigation on friction stir welding of AZ31 magnesium alloy

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