Optimization on microstructure, mechanical properties and damping capacities of duplex structured Mg-8Li-4Zn-1Mn alloys

Cao, T.; Zhu, Yan; Gao, Yu-Yang; Yang, Yan; Zhou, Gang; Cui, Xiaofei; Wen, Cuié; Jiang, Bin; Peng, Xiaodong; Pan, Fusheng

doi:10.1007/s12613-022-2572-7

Cited by 10 publications

(1 citation statement)

References 46 publications

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“…Magnesium–lithium (Mg–Li) alloys have garnered significant attention as ultralight alloys that are considered as promising next-generation lightweight structural materials. − Among various Mg structural materials, the density of Mg–Li alloy is 1.35–1.65 g/cm 3 , which is only half that of aluminum. , This low density, coupled with its remarkable properties such as high specific strength and stiffness, good damping, and excellent electrical and thermal conductivity, are the advantages which make Mg–Li alloys attractive for aerospace, medical, and automotive applications. − Despite these remarkable properties, Mg–Li alloys are challenged in terms of their absolute low strength (yield strengths (YS) ≤ 200 MPa. , Although the plasticity of Mg–Li alloys is superior to that of conventional Mg alloys, increasing their strength while maintaining ductility is critical for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Uncovering the Interfacial Strengthening Mechanisms of α-Mg/Mg₂Sn/β-Li Interfaces Using First-Principle Calculations and HAADF-STEM

Tian,

Wang,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

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Previously, we reported our new invention of an ultralight (ρ = 1.61 g/cm 3 ) and super high modulus (E = 64.5 GPa) Mg−Li−Al−Zn−Mn−Gd−Y−Sn (LAZWMVT) alloy. Surprisingly, the minor additions of Sn contribute to significant strength and stiffness increases. In this study, we found that Mg 2 Sn was not only the simple precipitate but also acted as the glue to bind the α-Mg/β-Li interface in a rather complicated way. To explore its mechanism, we have performed first-principle calculations and HAADF-STEM experiments on the interfacial structures. It was found that the interfacial structural models of α-Mg/β-Li, α-Mg/Mg 2 Sn, and β-Li/ Mg 2 Sn composite interfaces prefer to form α-Mg/Mg 2 Sn/β-Li ternary composite structures due to the stable formation enthalpy (ΔH: −1.95 eV/atom). Meanwhile, the interface cleavage energy and critical cleavage stress show that Mg 2 Sn contribute to the interfacial bond strength better than the β-Li/α-Mg phase bond strength (σ b (β-Li/Mg 2 Sn): 0.82 GPa > σ b (α-Mg/Mg 2 Sn): 0.78 GPa > σ b (β-Li/α-Mg): 0.62 GPa). Based on the interfacial electronic structure analysis, α-Mg/Mg 2 Sn and β-Li/Mg 2 Sn were found to have a denser charge distribution and larger charge transfer at the interface, forming stronger chemical bonds. Additionally, according to the crystal orbital Hamiltonian population analysis, the bonding strength of the Mg−Sn atom pair was 2.61 eV, which was higher than the Mg−Li bond strength (0.39 eV). The effect of the Mg 2 Sn phase on the stability and interfacial bonding strength of the alloying system was dominated by the formation of stronger and more stable Mg−Sn metal covalent bonds, which mainly originated from the contribution of the Mg 3p-Sn 5p orbital bonding states.

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Section: Introductionmentioning

confidence: 99%

Uncovering the Interfacial Strengthening Mechanisms of α-Mg/Mg₂Sn/β-Li Interfaces Using First-Principle Calculations and HAADF-STEM

Tian,

Wang,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

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Effect of Extrusion Temperature on Microstructure and Mechanical Properties of Mg–Al–Zn Alloy Prepared by Solid‐State Recycling of Mixed Waste Chips

Lei,

Xu,

Jiang

et al. 2024

Adv Eng Mater

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The recycled Mg–Al–Zn alloys are successfully fabricated through solid‐state recycling of mixed waste chips, including cold pressing and hot extrusion. The effects of extrusion temperature on the microstructure evolution, slip mode, tensile properties, and hardness are studied. The homogeneous fine dynamic recrystallization (DRXed) grains with an average grain size of less than 13.1 μm can be obtained at four different extrusion temperatures (250, 300, 350, and 400 °C). The average grain size of the DRXed grains continuously increases with the rising extrusion temperature. However, the yield strength (YS), ultimate tensile strength (UTS), and elongation to failure (EL) of the recycled alloys increase first and then decrease. The recycled Mg–Al–Zn alloys at 350 °C demonstrate excellent mechanical properties with the YS of 134.6 MPa, UTS of 286.2 MPa, EL of 7.4%, and Vickers hardness of 75.2 HV, respectively. In addition, the slip mode is transformed from the previous basal slip to the coactivation of multiple slips composed of the basal slip, prismatic slip, and pyramidal slip with the rising extrusion temperature.

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Hot deformation behavior of novel high-strength Mg-0.6Mn-0.5Al-0.5Zn-0.4Ca alloy

Chen,

Yang,

et al. 2023

Int J Miner Metall Mater

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Optimization on microstructure, mechanical properties and damping capacities of duplex structured Mg-8Li-4Zn-1Mn alloys

Cited by 10 publications

References 46 publications

Uncovering the Interfacial Strengthening Mechanisms of α-Mg/Mg₂Sn/β-Li Interfaces Using First-Principle Calculations and HAADF-STEM

Uncovering the Interfacial Strengthening Mechanisms of α-Mg/Mg₂Sn/β-Li Interfaces Using First-Principle Calculations and HAADF-STEM

Effect of Extrusion Temperature on Microstructure and Mechanical Properties of Mg–Al–Zn Alloy Prepared by Solid‐State Recycling of Mixed Waste Chips

Hot deformation behavior of novel high-strength Mg-0.6Mn-0.5Al-0.5Zn-0.4Ca alloy

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Optimization on microstructure, mechanical properties and damping capacities of duplex structured Mg-8Li-4Zn-1Mn alloys

Cited by 10 publications

References 46 publications

Uncovering the Interfacial Strengthening Mechanisms of α-Mg/Mg2Sn/β-Li Interfaces Using First-Principle Calculations and HAADF-STEM

Uncovering the Interfacial Strengthening Mechanisms of α-Mg/Mg2Sn/β-Li Interfaces Using First-Principle Calculations and HAADF-STEM

Effect of Extrusion Temperature on Microstructure and Mechanical Properties of Mg–Al–Zn Alloy Prepared by Solid‐State Recycling of Mixed Waste Chips

Hot deformation behavior of novel high-strength Mg-0.6Mn-0.5Al-0.5Zn-0.4Ca alloy

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Uncovering the Interfacial Strengthening Mechanisms of α-Mg/Mg₂Sn/β-Li Interfaces Using First-Principle Calculations and HAADF-STEM

Uncovering the Interfacial Strengthening Mechanisms of α-Mg/Mg₂Sn/β-Li Interfaces Using First-Principle Calculations and HAADF-STEM