Effect of icosahedral phase on the crystallographic texture and mechanical anisotropy of duplex structured Mg–Li alloys

Xu, Daokui; Li, C.Q.; Wang, B.J.; Han, En‐Hou

doi:10.1016/j.matdes.2015.08.123

Cited by 49 publications

(20 citation statements)

References 38 publications

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“…Thus, it demonstrates that the addition of Zn and Y in Mg-6%Li-6%Zn-1.2%Y alloy can effectively impede the phase transformation from β-Li to α-Mg and retard the grain growth. Similar results have also been reported in previous work1416.…”

Section: Resultssupporting

confidence: 93%

“…reported that the finely dispersed particles were MgLiZn particles and could quickly precipitate and coarsen in β-Li phases during artificial ageing at 200 °C14. Moreover, it demonstrated that the I-phase/α-Mg and W-phase/α-Mg eutectic pockets could be easily broken during extrusion process216. Additionally, the large bulk phases can be recognized as W-phase because they are hardly deformed during severe plastic deformation1630.…”

Section: Resultsmentioning

confidence: 98%

“…However, compared with the traditional Mg alloys, the mechanical strength of Mg-Li alloys is much lower even after severe plastic deformation (e.g. hot extrusion or equal channel angular extrusion)12141516. Moreover, their thermal stability is poor17181920, which is mainly ascribed to the early precipitation of phase particles during ageing process17181920212223.…”

mentioning

confidence: 99%

“…Recently, Xu et al . reported that I-phase (Mg 3 Zn 6 Y, icosahedral quasicrystal structure) could be in-situ formed through adding Zn and Y and controlling the Zn/Y atomic ratio of 6 in duplex structured Mg-Li alloys, which improved their mechanical strength to a great degree2141516. Additionally, I-phase exhibits many attractive properties such as high hardness, thermal stability, high corrosion resistance, low coefficient of friction and low interfacial energy, etc 242526272829.…”

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confidence: 99%

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Natural ageing responses of duplex structured Mg-Li based alloys

Wang

et al. 2017

Sci Rep

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Natural ageing responses of duplex structured Mg-6%Li and Mg-6%Li-6%Zn-1.2%Y alloys have been investigated. Microstructural analyses revealed that the precipitation and coarsening process of α-Mg particles could occur in β-Li phases of both two alloys during ageing process. Since a certain amount of Mg atoms in β-Li phases were consumed for the precipitation of abundant tiny MgLiZn particles, the size of α-Mg precipitates in Mg-6%Li-6%Zn-1.2%Y alloy was relatively smaller than that in Mg-6%Li alloy. Micro hardness measurements demonstrated that with the ageing time increasing, the α-Mg phases in Mg-6%Li alloy could have a constant hardness value of 41 HV, but the contained β-Li phases exhibited a slight age-softening response. Compared with the Mg-6%Li alloy, the age-softening response of β-Li phases in Mg-6%Li-6%Zn-1.2%Y alloy was much more profound. Meanwhile, a normal age-hardening response of α-Mg phases was maintained. Tensile results indicated that obvious ageing-softening phenomenon in terms of macro tensile strength occurred in both two alloys. Failure analysis demonstrated that for the Mg-6%Li alloy, cracks were preferentially initiated at α-Mg/β-Li interfaces. For the Mg-6%Li-6%Zn-1.2%Y alloy, cracks occurred at both α-Mg/β-Li interfaces and slip bands in α-Mg and β-Li phases.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 98%

mentioning

confidence: 99%

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confidence: 99%

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Natural ageing responses of duplex structured Mg-Li based alloys

Wang

et al. 2017

Sci Rep

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“…10. The random orientation of the recrystallization grains would result in texture weakening [19,20].…”

Section: Dynamic Recrystallization and Texture Of As-extruded Alloysmentioning

confidence: 99%

Microstructure, texture, mechanical properties and electromagnetic shielding effectiveness of Mg–Zn–Zr–Ce alloys

Liu

Chen

Pan

et al. 2016

Materials Science and Engineering: A

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Fabrication of Nanocrystalline High‐Strength Magnesium−Lithium Alloy by Rotary Swaging

et al. 2021

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A high‐strength magnesium‐lithium alloy is successfully fabricated via cold rotary swaging herein. The microstructure evolution in the central and edge regions of the alloy bar during the swaging process is explored using transmission electron microscopy. The results show that nanograins with high‐angle grain boundaries are formed in the central region of the alloy bar after five‐pass swaging, resulting in higher microhardness and strength obtained in the central region than in the edge region. The sample in the central region of the five‐pass swaged alloy bar exhibits a specific strength of 313 kN m kg−1 and a yield strength of 463 MPa. The nanocrystallization process of initial coarse grains in the central region of the alloy bar contains massive twinning first and subsequent refinement of twin/matrix lamellae through the formation of many dislocation arrays. However, it is not possible to form nanograins in the edge region of the alloy bar after five‐pass swaging because of the lower twinning activity and the difficulty of forming dislocation arrays compared with the central region.

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Effect of icosahedral phase on the crystallographic texture and mechanical anisotropy of duplex structured Mg–Li alloys

Cited by 49 publications

References 38 publications

Natural ageing responses of duplex structured Mg-Li based alloys

Natural ageing responses of duplex structured Mg-Li based alloys

Microstructure, texture, mechanical properties and electromagnetic shielding effectiveness of Mg–Zn–Zr–Ce alloys

Fabrication of Nanocrystalline High‐Strength Magnesium−Lithium Alloy by Rotary Swaging

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