Mechanical behavior of Mg-Li-Al alloys

Rahulan, N.; Gopalan, Sundararaman; Kumaran, S.

doi:10.1016/j.matpr.2018.06.123

Cited by 28 publications

(7 citation statements)

References 7 publications

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“…Research [ 81 ] on the Mg-Li binary system showed that when the content of Li was higher than 5.7%, Li atoms would exist in the alloy in the form of solid solution atoms and form a single solid solution α-Mg; when the content of Li was higher than 10.3%, Mg atoms would dissolve in Li and form a single solid solution β-Li; and when the Li content was between 5.7% and 10.3%, the alloy comprised of α- Mg and β-Li’s bi-directional organization [ 82 ]. As a phase metal element, Li can not only greatly improve its formability but also greatly reduce its density [ 82 , 83 , 84 ]. That is why the Mg-Li alloy is called an ultra-light alloy.…”

Section: Damping Magnesium Alloy Systemmentioning

confidence: 99%

“…For example, Al is a typical alloying element in Mg-Li alloys, and it can increase the strength and hardness of Mg-Li alloys without sacrificing their density and damping properties [ 90 ]. A total of 4% Al was added to Mg-5Li by N Rahulan et al [ 83 ], and the as-extruded Mg-5Li-4Al alloy exhibited a high specific strength of 145 kNm/kg. On this basis, Gang Zhou et al [ 48 ] prepared a high-strength and high-damping Mg-4Li-3Al-0.3Mn alloy by adding trace amounts of Mn to the Mg-Li-Al alloy and combining it with a hot extrusion.…”

Section: Damping Magnesium Alloy Systemmentioning

confidence: 99%

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Research Progress and the Prospect of Damping Magnesium Alloys

Wang,

Zou,

Dang

et al. 2024

Materials

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As the lightest structural metal material, magnesium alloys possess good casting properties, high electrical and thermal conductivity, high electromagnetic shielding, and excellent damping properties. With the increasing demand for lightweight, high-strength, and high-damping structural materials in aviation, automobiles, rail transit, and other industries with serious vibration and noise, damping magnesium alloy materials are becoming one of the important development directions of magnesium alloys. A comprehensive review of the progress in this field is conducive to the development of damping magnesium alloys. This review not only looks back on the traditional damping magnesium alloys represented by Mg-Zr alloys, Mg-Cu-Mn alloys, etc. but also introduces the new damping magnesium materials, such as magnesium matrix composites and porous magnesium. But up to now, there have still been some problems in the research of damping magnesium materials. The effect of spiral dislocation on damping is still unknown and needs to be studied; the contradiction between damping performance and mechanical properties still lacks a good balance method. In the future, the introduction of more diversified damping regulating methods, such as adding other elements and reinforcements, optimizing the manufacturing method of damping magnesium alloy, etc., to solve these issues, will be the development trend of damping magnesium materials.

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Section: Damping Magnesium Alloy Systemmentioning

confidence: 99%

Section: Damping Magnesium Alloy Systemmentioning

confidence: 99%

Research Progress and the Prospect of Damping Magnesium Alloys

Wang,

Zou,

Dang

et al. 2024

Materials

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“…Magnesium-lithium alloys are by far among the lightest metal structure materials, with high specific strength, stiffness, ductility, and good electrical conductivity [1][2][3]. As a "21st-century green engineering material", it has a wide application prospect in many high-end fields such as aerospace, electronics, and medical devices [4].…”

Section: Introductionmentioning

confidence: 99%

Effects of Friction Stir Processing on the Microstructure and Mechanical Properties of an Ultralight Mg-Li Alloy

Song,

Wu,

et al. 2024

Crystals

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Magnesium–lithium alloys are arguably the lightest metal structural materials but have low strength. In order to increase strength, friction stir processing (FSP) is applied to a hot-rolled Mg-10Li-3Al-3Zn (LA103Z) sheet to study the effects on the microstructure and mechanical properties. In this study, the strengthening mechanisms of various FSP regions of an Mg-Li alloy were clarified by a combination of numerical simulation and experimental method. Based on ANSYS APDL, a finite element model with a moving heat source is established. Rotational speeds of 800, 1000, and 1200 rpm and traverse speeds of 100, 110, and 120 mm/min were used in this research. The simulation results confirm that the influence of the rotation speed on the alloy temperature field is greater than that of the travel speed. The temperature of the processing area increases with an increase in rotation speed and decreases with an increase in travel speed. Then, hot-rolled LA103Z alloy plates are processed by FSP. The correspondence between the numerical simulation and experiment was verified by infrared thermography. The results indicate that FSP decreases the grain size significantly for the dynamic recrystallization and dramatic mechanical crushing of the stirring pin. The α-Mg and AlLi are solid soluted in the β-Li matrix. The tensile strength of the processing zone is 260.67 MPa (1000 rpm, 110 mm/min) versus the 170.47 MPa of the base metal. The SZ has the highest microhardness of 77.8 HV (800 rpm, 120 mm/min) and decreases gradually to the BM. The severe deformation, recrystallization, and solid solution of the α-Mg are important factors contributing to the improved mechanical properties.

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“…In some highly precise electronic equipment and aerospace fields, ultra-thin magnesium alloys with a thickness of less than 0.5 mm are needed. Mg-Li alloy is the lightest metal structural material so far, which has the advantages of high specific strength, high specific stiffness, and good ductility, and has a very broad application prospect [ 2 , 3 , 4 ]. The content of Li in LZ91 Mg-Li alloy is 8.89%, which is higher than the highest solubility of Li in the α-Mg phase (Hexagonal close-packed structure, HCP) of 5.3%, forming a two-phase microstructure composed of α-Mg phase with HCP structure and β-Li phase with body-centered cubic (BCC) structure [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution Mechanism of Ultra-Thin Dual Phase Magnesium–Lithium Alloy during Asymmetric Warm Rolling

Shang²,

Chen

et al. 2022

Materials

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Magnesium–lithium alloy is the lightest metal alloy material so far, and the ultra-thin plate is also one of the main trends in the future development of Mg-Li alloy. In order to explore how to prepare LZ91 ultra-thin Mg-Li alloy, this topic adopts the combination of the finite element method (FEM) and visco-plastic self-consistent (VPSC) calculation, electron back-scattered diffraction (EBSD) and tensile experiment, and uses the asymmetric warm rolling process to realize the processing of ultra-thin LZ91 Mg-Li alloy plate with a thickness of 0.25 mm. The experimental results show that the maximum basal texture strengths of 1 mm initial plate and 0.25 mm ultra-thin rolled plate are 36.02 mud and 29.19 mud, respectively. The asymmetric warm rolling process not only reduces the basal texture strength but also significantly refines the grains. The tensile strength and yield strength of 0.25 mm ultra-thin rolled plate along the rolling direction reached 206.8 MPa and 138.4 MPa, respectively. This has a positive effect on the mechanical properties of subsequent materials. VPSC results show that the base slip is the main factor in Mg-Li alloy asymmetric warm rolling, and a large number of tensile twinning are initiated due to the coordinated deformation of the body-centered cubic (BCC) phase, which is beneficial to improve the plastic deformation capacity of Mg-Li alloy.

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Mechanical behavior of Mg-Li-Al alloys

Cited by 28 publications

References 7 publications

Research Progress and the Prospect of Damping Magnesium Alloys

Research Progress and the Prospect of Damping Magnesium Alloys

Effects of Friction Stir Processing on the Microstructure and Mechanical Properties of an Ultralight Mg-Li Alloy

Microstructure Evolution Mechanism of Ultra-Thin Dual Phase Magnesium–Lithium Alloy during Asymmetric Warm Rolling

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