New strategy to solve the ambient strength-ductility dilemma in precipitation-strengthened Mg-Gd alloys via Li addition

Yu, Zijian; Huang, Yuanding; Liu, Linlin; Shi, Kang; Du, Baotian; Liu, Ke; Li, Shubo; Du, Wenbo

doi:10.1016/j.scriptamat.2022.114901

Cited by 20 publications

(3 citation statements)

References 44 publications

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“…Because of their hexagonal close‐packed (HCP) crystal structure, Mg alloys usually possess poor formability and ductility at room temperature 4–6 . To solve the dilemma, the addition of Li significantly improves the ductility of Mg alloy has been reported 7–9 . For the LA103Z Mg‐Li alloy in this work, due to the α‐Mg and β‐Li dual‐phase structure in the material has the benefit of balancing strength and ductility 10 .…”

Section: Introductionmentioning

confidence: 91%

“…[4][5][6] To solve the dilemma, the addition of Li significantly improves the ductility of Mg alloy has been reported. [7][8][9] For the LA103Z Mg-Li alloy in this work, due to the α-Mg and β-Li dual-phase structure in the material has the benefit of balancing strength and ductility. 10 Thus, the Mg-Li alloy is playing an important role gradually in the automotive, aviation, and aerospace industries with high ductile performance.…”

Section: Introductionmentioning

confidence: 99%

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Investigation into the anisotropic damage behavior of LA103Z Mg‐Li alloy rolling sheet using X‐ray computed tomography and numerical modeling

Xu,

Qian,

et al. 2023

Fatigue Fract Eng Mat Struct

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The anisotropic damage behavior has a great influence on the formability of rolling sheets. This work aimed to investigate the anisotropic damage mechanism of the LA103Z Mg‐Li alloy rolling sheet by combining mesoscale detection and modeling. The X‐ray computed tomography (XCT) and scanning electron microscope (SEM) were applied to characterize the evolution of damage morphology and volume fraction in RD, DD, and TD directions of the rolling sheet. The GTN damage model was calibrated by the experimental results with the representative volume element (RVE) method. The anisotropic damage mechanism was revealed via experimental and modeling results. The micro void nucleation strain εN was critical to determine the initiation moment of the anisotropic damage. The continuous nucleation in RD direction, the severe growth in DD direction, and the massive coalescence in TD direction were the micro void evolution competition results that caused the anisotropy for damage mechanism and fracture strain.

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Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Investigation into the anisotropic damage behavior of LA103Z Mg‐Li alloy rolling sheet using X‐ray computed tomography and numerical modeling

Xu,

Qian,

et al. 2023

Fatigue Fract Eng Mat Struct

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“…The aging behaviors of magnesium alloys with rare earth elements (Mg–RE) have received considerable attention over the last decade because ultrahigh-strength Mg–RE alloys inevitably require precipitate regulation [ 1 , 2 ]. Up to now, the understanding of the precipitation sequences of main series of Mg alloys has been relatively comprehensive, where Mg–Y–Nd alloys in a supersaturated solid solution state (SSSS) are often subjected to phase transformation during isothermal heating: SSSS → ordered GP zones (zig-zag shape) → β″ (Mg 3 Nd, hcp structure) → β′ (Mg 12 YNd, orthorhombic structure)→ β 1 (Mg 3 (Nd, Y), fcc structure) → β (Mg 14 Nd 2 Y, fcc structure) [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Deformation Behavior of β Phase in a WE54 Magnesium Alloy

et al. 2023

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Second phases play a significant role in the development of high-performance magnesium alloys with rare earth elements. Here, in situ tensile tests combined with synchrotron radiation were carried out to investigate the deformation behavior of β phases in a WE (Mg–Y–Gd–Nd) alloy. By lattice strain analysis, it was found that micro load continuously transferred from the soft α-Mg matrix to the hard β phases during the whole plastic deformation, while this behavior was much more obvious at the beginning of deformation. Based on diffraction peak broadening, Williamson–Hall (W–H) plotting was used to study the microstrain of β phases. The results showed that the microstrain of β phases increased rapidly within 4% plastic strain and reached the maximum at plastic strain of ~6.5%. Since the β phases acted as hard phases, the microstrain was considered as a sign of the stress concentration near phase interfaces. It was also suggested that the effective release of local stress concentration at the β/α-Mg interface benefited the ductility of the WE alloy by the plastic deformation of β phases and phase interface sliding.

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Effect of Yb Addition on the Microstructure and Mechanical Properties of the Mg–4Sm–3Gd–0.5Zr Alloy

Zhang,

Li,

Chen

et al. 2024

Met. Mater. Int.

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New strategy to solve the ambient strength-ductility dilemma in precipitation-strengthened Mg-Gd alloys via Li addition

Cited by 20 publications

References 44 publications

Investigation into the anisotropic damage behavior of LA103Z Mg‐Li alloy rolling sheet using X‐ray computed tomography and numerical modeling

Investigation into the anisotropic damage behavior of LA103Z Mg‐Li alloy rolling sheet using X‐ray computed tomography and numerical modeling

Deformation Behavior of β Phase in a WE54 Magnesium Alloy

Effect of Yb Addition on the Microstructure and Mechanical Properties of the Mg–4Sm–3Gd–0.5Zr Alloy

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