Hot Deformation Behavior and Microstructures Evolution of GNP-Reinforced Fine-Grained Mg Composites

Hu, Hengrui; Qin, Jiayu; Zhu, Yunpeng; Wang, Jinhui; Li, Xiaoqiang; Jin, Peipeng

doi:10.1007/s40195-023-01524-9

Cited by 6 publications

(4 citation statements)

References 38 publications

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“…This indicates that the addition of Ti particles causes the lattice distortion of the matrix and a decrease in average grain size. [ 24 ] Notably, no diffraction peak associated with MgO is detected, indicating the minimal presence of MgO impurities introduced during the mechanical milling and subsequent SPS process.…”

Section: Resultsmentioning

confidence: 99%

Simultaneous Improvement of the Strength and Plasticity for Ti‐Reinforced Fine‐Grained Magnesium Matrix Composites Prepared by Powder Metallurgy

Xu,

Meng,

Cheng

et al. 2024

Adv Eng Mater

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Ti‐reinforced AZ61 magnesium matrix composites, demonstrating enhanced strength and plasticity, are synthesized via powder metallurgy method, including mechanical milling and spark plasma sintering. This study investigates the evolution of microstructure and compressive mechanical properties of Ti/AZ61 composites across various Ti weight percentages: 0%, 5%, 10%, 15%, and 20%. The composites at 5, 10, 15, and 20 wt% Ti concentrations are effectively compacted, achieving relative densities of 99.1%, 99.4%, 98.7%, and 98.6%, respectively. The integration of Ti particles facilitates a refinement of the Mg grain size. The average Mg grain size in the AZ61 alloy is refined from 8.7 ± 3.6 to 7.2 ± 4.5 μm and 4.4 ± 2.2 μm upon the addition of 5 and 10 wt% Ti particles. Conversely, incremental Ti concentrations of 15 and 20 wt% result in minor increases in the average Mg grain size to 5.3 ± 2.6 and 5.7 ± 3.2 μm, respectively. Interfacial compounds, notably Al3Ti, are identified. Compressive mechanical properties, including compressive yield stress (CYS), ultimate compressive stress (UCS), and compressive failure strain (CFS), are synergistically enhanced with Ti particle incorporation. Optimal mechanical properties, specifically CYS at 250 MPa, UCS at 502 MPa, and CFS at 13%, are observed in the 10 wt% Ti/AZ61 composite. The enhanced compressive behavior is attributed to strong interfacial bonding between deformable Ti and Mg, effective load transfer, and grain refinement. Additional contributing factors include variations in the elastic modulus and thermal expansion coefficients between Ti and Mg. The fracture mechanisms observed in the Ti/AZ61 composites involve both ductile and brittle modes of failure.

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Section: Resultsmentioning

confidence: 99%

Simultaneous Improvement of the Strength and Plasticity for Ti‐Reinforced Fine‐Grained Magnesium Matrix Composites Prepared by Powder Metallurgy

Xu,

Meng,

Cheng

et al. 2024

Adv Eng Mater

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“…Magnesium alloys have the significant effect of reducing weight in the automotive and aerospace industries due to their low density and high specific strength [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. In recent years, rare earth magnesium alloys have received increasing attention due to their high performance at both room and high temperatures [ 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…Figure13shows the pole figures and IPF figures of the (0001) plane, (10-10) plane, and(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) plane in the 1st layer, the 6th layer, and the 11th layer. The additive region of the alloy is composed of equiaxed crystals, and the crystals have no obvious orientation.…”

mentioning

confidence: 99%

Simulation Study on Temperature and Stress Fields in Mg-Gd-Y-Zn-Zr Alloy during CMT Additive Manufacturing Process

Zhao,

et al. 2024

Materials

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A new heat source combination, consisting of a uniform body heat source and a tilted double ellipsoidal heat source, has been developed for cold metal transfer (CMT) wire-arc additive manufacturing of Mg-Gd-Y-Zn-Zr alloy. Simulations were conducted to analyze the temperature field and stress distribution during the process. The optimal combination of feeding speed and welding speed was found to be 8 m/min and 8 mm/s, respectively, resulting in the lowest thermal accumulation and residual stress. Z-axis residual stress was identified as the main component of residual stress. Electron Backscatter Diffraction (EBSD) testing showed weak texture strength, and Kernel Average Misorientation (KAM) analysis revealed that the 1st layer had the highest residual stress, while the 11th layer had higher residual stress than the 6th layer. Microhardness in the 1st, 11th, and 6th layers varies due to residual stress impacts on dislocation density. Higher residual stress increases dislocation density, raising microhardness in components. The experimental results were highly consistent with the simulated results.

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“…[4]. Graphene based reinforcements, including graphene nanoplate (GNP) [5,6], graphene oxide (RGO) [7], graphene nanosheet (GNS) [8] etc., have also attracted many researches to develop MMCs. Besides, Mg-based bimetal plates exhibit combined advantages of two metals, which show optimized mechanical properties including strength, fatigue, and abrasive resistance, such as Mg/Al, Mg/Ti, etc.…”

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confidence: 99%

A Special Editor’s Issue on Magnesium Matrix Composites

Chen,

Yang

2024

Acta Metall. Sin. (Engl. Lett.)

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Hot Deformation Behavior and Microstructures Evolution of GNP-Reinforced Fine-Grained Mg Composites

Cited by 6 publications

References 38 publications

Simultaneous Improvement of the Strength and Plasticity for Ti‐Reinforced Fine‐Grained Magnesium Matrix Composites Prepared by Powder Metallurgy

Simultaneous Improvement of the Strength and Plasticity for Ti‐Reinforced Fine‐Grained Magnesium Matrix Composites Prepared by Powder Metallurgy

Simulation Study on Temperature and Stress Fields in Mg-Gd-Y-Zn-Zr Alloy during CMT Additive Manufacturing Process

A Special Editor’s Issue on Magnesium Matrix Composites

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