Diffusion behaviour and mechanical properties of binary Mg–Gd system

Li, Yang; Yuan, Yuan; Chen, Tao; Dai, Xu; Zhang, Ling; Li, Dajian; Tang, Aitao; Wang, Yi; Zhang, Lijun; Pan, Fusheng

doi:10.1016/j.intermet.2021.107171

Cited by 26 publications

(3 citation statements)

References 86 publications

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“…In this case, the solute atoms do not have enough time to diffuse, so the Mg 2 Gd phases were preferentially precipitated [25]. The Mg 2 Gd phase has a high melting point and a low diffusion coefficient [26], so it exhibits good thermal stability during the solid solution treatment. However, the Mg 2 Gd phase was not detected in the XRD patterns due to its minor amount.…”

Section: Resultsmentioning

confidence: 99%

Effect of trace Al and Ca co-addition and solution treatment on the microstructure and mechanical properties of Mg-10Gd alloys

Liu

Wang

et al. 2023

Mater. Res. Express

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To reduce the density and cost while improving the ductility of creep-resistant Mg-Gd system alloys, a total of 2 wt.% Al and Ca were added to an Mg-10Gd alloy for partial substituting Gd element. The prepared alloys were subjected to solution treatment at 500 OC for several hours, and the variations in microstructure and mechanical properties were investigated. To reveal the effect of the combined addition of Al and Ca on the microstructure and mechanical properties of the Mg-10Gd alloys, Mg-10Gd alloys containing the same amount of Al or Ca were also fabricated and characterized. By comparison, it was found that only the co-addition of Al and Ca simultaneously improved the hardness, ultimate tensile strength, yield strength, and elongation of the Mg-10Gd system alloys in both as-cast and solid solution states.

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Section: Resultsmentioning

confidence: 99%

Effect of trace Al and Ca co-addition and solution treatment on the microstructure and mechanical properties of Mg-10Gd alloys

Liu

Wang

et al. 2023

Mater. Res. Express

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“…During deformation, the matrix and particles are considered to behave as elastic-plastic and linear elastic materials, respectively. For the elastic properties of the particles, Young’s modulus and hardness are set at 57.8 ± 4.79 GPa and 4.11 ± 0.30 GPa, respectively, based on reported experimental results [ 40 ]. The mechanical properties of the matrix are determined by reverse analysis from load–displacement curves obtained by nanoindentation tests in this study.…”

Section: Finite Element Modelingmentioning

confidence: 99%

Numerical Investigation on Precipitation Hardening of Mg-Gd Alloys

Ge,

Yang,

et al. 2024

Materials

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The second-phase particles in magnesium alloys could affect the mechanical properties of the material significantly. In this work, 3D finite element models with explicit incorporation of second-phase particles are established. The simulations are calibrated with the experimental results of the Mg-1Gd alloy. The influences of factors, such as the particle distribution, size, and orientation of cylindrical particles, on precipitation hardening are investigated in detail. Three interface conditions between particles and the matrix—perfect bonding and high- and low-strength bonding—are studied at the same time. The interface conditions are shown to exert a stronger influence on precipitation hardening compared to the factors of particle distribution and size. In contrast, the influence of the orientation of cylindrical particles at grain boundaries outweighs the effect of interface property. When second-phase particles are relatively large and all located at grain boundaries, the hardening effect can be improved, and the magnesium alloy shows relatively high flow stress. However, the high hardening effect from the second-phase particles could result in high local stress concentration and possible early failure or low ductility of Mg alloys.

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“…Among them, Mg–RE alloys were attractive due to their remarkable age-hardening response, excellent creep resistance and good formability [ 15 ]. Specifically, Mg–Gd [ 16 ], Mg–Y [ 17 ] and Mg–Nd [ 18 ] are the most common heat-resistant Mg alloys. Over the past few decades, more and more research information concerning Mg–Nd alloy both experimentally and theoretically have been extensively reported in the literature.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Simulation Investigation of Nd Additions on As-Cast Microstructure and Precipitate Development in Mg–Nd System Alloys

Yan

Yang

et al. 2022

Materials

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The microstructure and precipitate evolution of as-cast Mg–Nd alloys with different contents of Nd was investigated via experimental and simulation methods. The research showed that the as-cast microstructure of Mg–Nd alloy consisted of α-Mg dendrites and the intermetallic phases. A metastable β phase precipitated, followed by α-Mg dendrites that could be confirmed as Mg12Nd by X-ray diffraction (XRD) analysis. The amount of β-Mg12Nd presented a rising trend with increasing Nd additions. In addition, the tertiary phase was also observed in as-cast Mg–Nd alloy when Nd content was greater than 3 wt.%, which precipitated from the oversaturated α-Mg matrix. The tertiary phase should be β1-Mg3Nd, which is also a metastable phase with a face-centered cubic lattice. However, it is a pity that the tertiary phase was not detected by the XRD technique. Moreover, an effective cellular automaton (CA) model was explored and applied to simulate the time-dependent α-Mg/β1-Mg3Nd eutectic growth. The simulated results of α-Mg/β1-Mg3Nd eutectic growth in Mg-3Nd presented that the growth of α-Mg dendrites was accompanied by the nucleation and growth of β1-Mg3Nd precipitates and eventually formed a eutectic structure. The eutectic morphologies for Mg–Nd system alloys with different Nd contents were also simulated using the proposed model, and the results revealed that α-Mg dendrite was a refinement, and the amount of α-Mg/β1-Mg3Nd eutectic was promoted, with increasing Nd content.

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Diffusion behaviour and mechanical properties of binary Mg–Gd system

Cited by 26 publications

References 86 publications

Effect of trace Al and Ca co-addition and solution treatment on the microstructure and mechanical properties of Mg-10Gd alloys

Effect of trace Al and Ca co-addition and solution treatment on the microstructure and mechanical properties of Mg-10Gd alloys

Numerical Investigation on Precipitation Hardening of Mg-Gd Alloys

Experimental and Simulation Investigation of Nd Additions on As-Cast Microstructure and Precipitate Development in Mg–Nd System Alloys

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