Microstructure and hardness of Mg–9Li–6Al– x La ( x =0, 2, 5) alloys during solid solution treatment

Fei, Pengfei; Qu, Zhikun; Wu, Ruizhi

doi:10.1016/j.msea.2014.12.014

Cited by 48 publications

(11 citation statements)

References 16 publications

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“…All Mg alloys show a similar microstructure and grain size, in which only Mg matrix and twin was observed. The purpose of solution treatment was to dissolve the brittle β -Mg (Mg 17 Al 12 ) particles, which inhibited bonding between Ti and Mg alloy into the matrix, and to create a uniform Al distribution on the bonding surface of Mg alloys [ 14 ]. Hereafter, the solution-treated Mg alloy was named as Mg alloy (ST).…”

Section: Resultsmentioning

confidence: 99%

Corrosion Behavior and Strength of Dissimilar Bonding Material between Ti and Mg Alloys Fabricated by Spark Plasma Sintering

et al. 2016

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Ti and solution treated Mg alloys such as AZ31B (ST), AZ61 (ST), AZ80 (ST) and AZ91 (ST) were successfully bonded at 475 °C by spark plasma sintering, which is a promising new method in welding field. The formation of Ti3Al intermetallic compound was found to be an important factor in controlling the bonding strength and galvanic corrosion resistance of dissimilar materials. The maximum bonding strength and bonding efficiency at 193 MPa and 96% were obtained from Ti/AZ91 (ST), in which a thick and uniform nano-level Ti3Al layer was observed. This sample also shows the highest galvanic corrosion resistance with a measured galvanic width and depth of 281 and 19 µm, respectively. The corrosion resistance of the matrix on Mg alloy side was controlled by its Al content. AZ91 (ST) exhibited the highest corrosion resistance considered from its corrode surface after corrosion test in Kroll’s etchant. The effect of Al content in Mg alloy on bonding strength and corrosion behavior of Ti/Mg alloy (ST) dissimilar materials is discussed in this work.

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Section: Resultsmentioning

confidence: 99%

Corrosion Behavior and Strength of Dissimilar Bonding Material between Ti and Mg Alloys Fabricated by Spark Plasma Sintering

et al. 2016

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“…Therefore, it is important to improve the comprehensive mechanical properties of Mg-Li-Al alloy. The previous studies (Hantzsche et al, 2010;Bao et al, 2013;Zhu et al, 2014;Fei et al, 2015) have shown that the addition of rare earth element yttrium (Y) can effectively improve the comprehensive mechanical properties of Mg-Li-Al alloys. Guo et al (2014) studied Mg-9Li-6Al-xY (x 0, 2) and found that adding rare earth element Y could not only precipitate Al 2 Y phase in the alloy to suppress the precipitation of AlLi phase, but effectively refine the grains as well, thus improving the comprehensive mechanical properties of the alloy.…”

Section: Introductionmentioning

confidence: 99%

Hot Tensile Deformation Behavior of Mg-4Li-1Al-0.5Y Alloy

Yang

Wang

et al. 2021

Front. Mater.

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The microstructure evolution and deformation mechanism of the as-extruded-annealed Mg-4Li-1Al-0.5Y alloy (denoted as LAY410) were investigated during the hot tensile deformation at the temperatures between 150°C and 300°C with strains from 8 × 10−5 s−1 to 1.6 × 10−3 s−1. The results show that when the strain rate decreases and/or the deformation temperature increases, the peak stress of the alloy gradually decreases, and the elongations to fracture gradually increases. The true stress–strain curves show typical dynamic recrystallization (DRX) softening characteristics. It is observed that the microstructure in the magnesium (Mg) alloy deformed at 150°C is mainly composed of the deformed grains and a few recrystallized grains. The microstructures in the Mg alloy deformed at 200°C consisted of substructures and a slightly increasing number of dynamic recrystallized grains. When the deformation temperature reaches 250°C, the number of recrystallized grains increases significantly, and the microstructures are dominated by recrystallized grains. Moreover, through theoretical calculation and result analysis, the activation energy was about 99.3 kJ/mol, and the hot tensile deformation mechanism was the alternate coordinated deformation mechanism among grain boundary slip (GBS), intragranular slip, and DRX.

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“…[10][11][12][13]. Via proper alloying, the Mg-Li-x alloys can be further strengthened by grain-boundary strengthening with fine grains [14], dispersion strengthening with composited hard particles [15], and solid solution and aging strengthening via heat treatment [16,17]. However, alloying of the Mg-Li alloys will inevitably sacrifice the advantage of low density.…”

Section: Introductionmentioning

confidence: 99%

Developing Improved Mechanical Property and Corrosion Resistance of Mg-9Li Alloy via Solid-Solution Treatment

Wang

Song

Cheng

et al. 2019

Metals

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Cast Mg-9Li alloy was successfully solid-solution (SS) treated via heating at 575 °C for 4.5 h and rapidly quenched with ice-water mixture. The mechanical property and corrosion resistance of the SS alloy were simultaneously improved. Rapid bcc/hcp phase transition of the alloy occurred during the quenching process, creating the newly precipitated needle-like fine α-Mg phase, uniformly distributed in the β-Li phase matrix. Dramatic grain refinement and uniform distribution of the α-Mg phase, as well as the massively increased α/β phase interfaces, are factors leading to the improved mechanical property of the SS alloy. Meanwhile, due to the modified duplex-phase structure, the SS alloy has a uniform corrosion-resistant surface film on the β-Li phase, which completely covers the entire alloy surface and efficiently protects the substrate. In addition, the SS alloy has fewer difference in the elements concentration and corrosion activity of the duplex phases, which reduces the pitting sensitivity and improves the corrosion resistance of the alloy matrix. The findings in this binary Mg-Li alloy can also serve as a benchmark for other more practical and complicated Mg-Li alloys.

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Microstructure and hardness of Mg–9Li–6Al– x La ( x =0, 2, 5) alloys during solid solution treatment

Cited by 48 publications

References 16 publications

Corrosion Behavior and Strength of Dissimilar Bonding Material between Ti and Mg Alloys Fabricated by Spark Plasma Sintering

Corrosion Behavior and Strength of Dissimilar Bonding Material between Ti and Mg Alloys Fabricated by Spark Plasma Sintering

Hot Tensile Deformation Behavior of Mg-4Li-1Al-0.5Y Alloy

Developing Improved Mechanical Property and Corrosion Resistance of Mg-9Li Alloy via Solid-Solution Treatment

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