Microstructure, mechanical properties and aging behavior of Mg–5Li–3Al–2Zn–xAg

Wu, Ruizhi; Zhang, Milin

doi:10.1016/j.msea.2009.05.008

Cited by 72 publications

(15 citation statements)

References 4 publications

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“…3a, LA53 alloy consists of ␣(Mg) matrix and lamellar intermetallic compound at grain boundary. Previous study [18] indicated that the lamellar particles are in AlLi phase, it is also identified in Fig. 4.…”

Section: Microstructuressupporting

confidence: 56%

Effects of calcium on the microstructures and tensile properties of Mg–5Li–3Al alloys

Wang

Zhang

et al. 2011

Materials Science and Engineering: A

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Section: Microstructuressupporting

confidence: 56%

Effects of calcium on the microstructures and tensile properties of Mg–5Li–3Al alloys

Wang

Zhang

et al. 2011

Materials Science and Engineering: A

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“…Grain refinement noted in Mg-14Li-3Al-3Ce alloy aged at 280 o C for 15 hours followed by subsequent fast-cooling at room temperature is shown in Figure 1 also exhibit the most refined microstructures owing to both aging process and fastcooling by water. This is because fast-cooling by water refines Mg-14Li-3Al-3Ce grains size and enhances the alloys crystallization rate during the cooling period at room temperature [31][32][33]. During aging, the amount of un-dissolved cerium particles decrease in some extent with the formation of Ce-contaning precipitates as depicted in Figure 3.…”

Section: Microstructurementioning

confidence: 97%

Effects of aging and fast-cooling on the mechanical properties of Mg-14Li-3Al-3Ce alloy

Muga

Guo

et al. 2017

Materials Science and Engineering: A

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Effects of aging and fast-cooling on the mechanical properties of Mg-14Li-3Al-3Ce alloy were investigated. Processing of aging and fast-cooling effectively refines microstructure and control the precipitation of intermetallics. Refined microstructures, enhanced tensile strengths and increased ductility were realized. Microstructures phase analysis depicts presence of dominant single coherent bcc β-phase and intermetallics.The as-cast Mg-14Li-3Al-3Ce alloy exhibits YS of 72.6MPa, UTS of 104.3MPa with ductility of 5.8%. Mg-14Li-3Al-3Ce alloys that were aged for longer hours show higher age-hardening response than the as-cast alloy. The alloy that was aged for 15 hours depicts YS of 105.5MPa, UTS of 136.8MPa and strain of 19.2%. Prolonged aging and fast-cooling activates grains/grain boundary refinement. The alloys exhibit high tensile strength after age-hardening response and fast-cooling processing. Precipitation of coherent bcc β-phase contributes to enhanced ductility where as intermetallics and strain aging enhances the tensile strength. Fast-cooling enhanced Mg-14Li-3Al-3Ce alloys strength through grain refinement, crystallization and solid solution strengthening.

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“…It is generally believed that the age-hardening phenomena of Mg-Li-Al connects with a metastable phase called θ (MgLi 2 Al). However, θ (MgLi 2 Al) is unstable and finally transforms to stable AlLi phase [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

The solution and aging behavior of Mg-8Li-3Al-xCe(x=0, 1.0) alloys

Lin¹,

Wu²,

Fei³

et al. 2021

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The microstructure and microhardness properties of the as-cast, as-soluted and as-aged alloys of Mg-8Li-3Al-x Ce(x = 0, 1.0) were investigated. The as-cast Mg-8Li-3Al (LA83) alloy consists of α-Mg, β-Li, AlLi and MgLi2Al phases. The as-cast LA83-1Ce alloy consists of α-Mg, β-Li, MgLi2Al, AlCe and Al2Ce phases. Besides, the addition of Ce can refine and spheroidize the microstructure of as-cast LA83 alloy. After the addition of Ce, the HV of α and β phases were improved by 137 % and 127 %, respectively, and the HV value difference between α and β became small. Heat treatment can raise the alloy-HV, α-HV and β-HV of LA83 and LA83-1Ce alloys. The variation in hardness during aging process is attributed to the precipitation of MgLi2Al phase and the possibility of the transformation from AlLi phase to MgLi2Al phase. With the increase of aging temperature, the size of MgLi2Al phase becomes larger apparently, causing the age softening phenomenon happens.K e y w o r d s : Mg-Li alloy, Ce, aging behavior microhardness, microstructure

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Microstructure, mechanical properties and aging behavior of Mg–5Li–3Al–2Zn–xAg

Cited by 72 publications

References 4 publications

Effects of calcium on the microstructures and tensile properties of Mg–5Li–3Al alloys

Effects of calcium on the microstructures and tensile properties of Mg–5Li–3Al alloys

Effects of aging and fast-cooling on the mechanical properties of Mg-14Li-3Al-3Ce alloy

The solution and aging behavior of Mg-8Li-3Al-xCe(x=0, 1.0) alloys

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