Effects of Cu/Mg ratio on the microstructure, mechanical and corrosion properties of Al-Li-Cu-Mg-X alloys

Medjahed, Aboubakr; Henniche, Abdelkhalek; Derradji, Mehdi; Yu, Tao; Wang, Yang; Wu, Ruizhi; Hou, Linrui; Zhang, Jinghuai; Li, Xin-Lin; Zhang, Milin

doi:10.1016/j.msea.2018.01.118

Cited by 57 publications

(18 citation statements)

References 40 publications

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“…The effects of the Cu/Mg ratio on the microstructure, properties, and fracture morphology of AlLiCuMg–X (X = Mn, Zr, Zn) alloys after homogenization treatment and hot rolling have been reported in our previous work . The results showed that Cu/Mg ratio significantly affects the microstructures of AlLi alloys.…”

Section: Introductionmentioning

confidence: 58%

“…[13,14] The effects of the Cu/Mg ratio on the microstructure, properties, and fracture morphology of Al─Li─Cu─Mg-X (X ¼ Mn, Zr, Zn) alloys after homogenization treatment and hot rolling have been reported in our previous work. [2] The results showed that Cu/Mg ratio significantly affects the microstructures of Al─Li alloys. The corrosion resistance, hardness, and tensile properties increase with the increase in Cu/Mg ratio from 0.83 to 4.3, when Li content is 1.9 wt% and (Cu þ Mg) <3.5 wt%.…”

Section: Introductionmentioning

confidence: 94%

“…In recent years, Al─Li alloys are attracting much attention in the fields of aerospace and automobile due to their high specific strength and specific modulus. [1][2][3] In binary Al─Li alloys, the addition of Li can reduce the density, increase the elastic modulus, and form second phases of δ 0 (Al 3 Li) and δ(AlLi). [4][5][6] The metastable δ 0 (Al 3 Li) phase with a cubic structure can induce strain localization due to the low interface energy of α(Al)/ δ 0 (Al 3 Li) and the low antiphase boundary energy of δ 0 (Al 3 Li) phase, resulting in low ductility and fracture toughness.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, AlLi alloys are attracting much attention in the fields of aerospace and automobile due to their high specific strength and specific modulus . In binary AlLi alloys, the addition of Li can reduce the density, increase the elastic modulus, and form second phases of δ′(Al 3 Li) and δ(AlLi) .…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and Mechanical Properties of the As‐Cast AlLiCuMgZr Alloy with High Li Content and Different Cu/Mg Ratios

Qian

et al. 2020

Adv Eng Mater

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Section: Introductionmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Microstructure and Mechanical Properties of the As‐Cast AlLiCuMgZr Alloy with High Li Content and Different Cu/Mg Ratios

Qian

et al. 2020

Adv Eng Mater

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“…Figure 4 showed that there was a large amount of Cu on the grain boundaries in the as-cast microstructure, forming dendritic segregation. This is because the process of uniform diffusion of Cu atoms in the solid phase occurred slowly, which easily formed coarse intermetallic constituent particles like Al 2 Cu on the grain boundaries together with Al atoms [29]. When Mg and Cu were simultaneously added, S (Al 2 CuMg) intermetallic constituent phases were easily formed and detected in Figure 6 [30,31].…”

Section: Microstructural Evolution Analysismentioning

confidence: 99%

Investigation on Microstructural Evolution and Properties of an Al-Cu-Li Alloy with Mg and Zn Microalloying during Homogenization

Wang

et al. 2018

Metals

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The microstructural evolution and properties of an Al-Cu-Li alloy with Mg and Zn microalloying (Al-3.5Cu-1.5Li-0.5Mg-0.4Zn-0.3Mn-0.12Zr-0.06Ti) ingot subjected to homogenization (second-step annealing at 500 °C for 24 h following first-step annealing at 400 °C for 8 h) were investigated. Mg-Zn atom clusters were enriched at the end of dendrites as well as low-melting eutectic phases such as S (Al2CuMg), T2 (Al6CuLi3), TB (Al7.5Cu4Li) and T1 (Al2CuLi) in the as-cast alloy. During homogenization, Mg-Zn atom clusters diffused from the segregation to the vacancies, leading to the dissolution of the low-melting eutectic phases. Not only Al3Zr particles were observed at 500 °C, but more fine and uniform spherical dispersoids appeared, which were assumed as Al3(ZrxTiyLi1−x−y). Mg and Zn microalloying can promoted the nucleation of Al3Zr and Al3(ZrxTiyLi1−x−y) dispersoids, as well as T (Al20Cu2Mn3) phases, which all inhibited recrystallization effectively and improve the uniformity of the grains due to the strong pinning effect. The yield ratio was decreased from 0.81 to 0.52 with the yield strength decreased from 172 MPa to 61 MPa, which showed better plastic deformation ability of the alloy subjected to homogenization. In addition, the dissolution of low-melting eutectic phases and formation of Al3(ZrxTiyLi1−x−y) dispersoids resulted in the significant improvement on thermal stability.

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Fabrication Process, Tensile, and Gamma Rays Shielding Properties of Newly Developed Fiber Metal Laminates Based on an Al–Li Alloy and Carbon Fibers‐Tungsten Carbide Nanoparticles Reinforced Phthalonitrile Resin Composite

et al. 2018

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In the present study, new fiber‐metal laminates (FMLs) are manufactured from the lay‐up process of the carbon fibers‐tungsten carbide nanoparticles/phthalonitrile (CFs‐WC/PN) composite and the Al–Li alloy. The properties of the developed hybrids are analyzed and compared with those of the monolithic alloy. Generally speaking, the results indicate that the amount of the fiber considerably affects the tensile properties. The mechanical properties of the FMLs show enhancements over both the Al–Li alloy and the CFs/PN composite individually. When the number of the composite layers varies from 4 to 12, the ultimate tensile strength of the prepared FMLs increase from 335.3 to 690.5 MPa. The FMLs present a ductile behavior (up to a failure strain of 20%), which can be attributed to the ductile fracture morphology of the Al–Li alloy. These improvements are the result of the synergistic combination of the high strength of composites and the superior ductility of metals. In the meantime, the gamma rays (γ‐rays) shielding test reveals that increasing the weight amount of the tungsten carbide (WC) nanoparticles in the composite noticeably improves the screening ratio, reaching the exceptional value of 46% for the hybrid containing 20 wt% of WC.

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Effects of Cu/Mg ratio on the microstructure, mechanical and corrosion properties of Al-Li-Cu-Mg-X alloys

Cited by 57 publications

References 40 publications

Microstructure and Mechanical Properties of the As‐Cast AlLiCuMgZr Alloy with High Li Content and Different Cu/Mg Ratios

Microstructure and Mechanical Properties of the As‐Cast AlLiCuMgZr Alloy with High Li Content and Different Cu/Mg Ratios

Investigation on Microstructural Evolution and Properties of an Al-Cu-Li Alloy with Mg and Zn Microalloying during Homogenization

Fabrication Process, Tensile, and Gamma Rays Shielding Properties of Newly Developed Fiber Metal Laminates Based on an Al–Li Alloy and Carbon Fibers‐Tungsten Carbide Nanoparticles Reinforced Phthalonitrile Resin Composite

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