Microstructure and strengthening mechanism of bimodal size particle reinforced magnesium matrix composite

Deng, Kun-kun; Shi, Jinhong; Wang, Cuiju; Wang, Xiaojun; Wu, Yunfeng; Nie, Kai-bo; Wu, Kun

doi:10.1016/j.compositesa.2012.03.007

Cited by 247 publications

(74 citation statements)

References 18 publications

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“…10-8.5,'' and the composite was fabricated by stir casting, the details of which had been reported in Ref. [16].…”

Section: Methodsmentioning

confidence: 99%

“…Softer Mg matrix containing large quantity of harden SiCp indicates the inhomogeneous deformation during hot compression process, which may result in the easy initiation of dislocations. Apart from grain boundaries, SiCp also have pronounced effect on inhibiting dislocation migration and thus lead to the pileup of dislocation around SiCp [16,31]. The increased dislocations can provide favorable conditions for DRX nucleation [15,32], so the X DRX of S-1.5 ?…”

Section: Analysis About the Drx Mechanism Influenced By Bimodal Size mentioning

confidence: 99%

“…[1 lm) particles may have various impacts on DRX as compared to that of single-sized particles. In the previous work [16] about the microstructure and strengthening mechanism of bimodal size particle-reinforced magnesium matrix composite, the bimodal size SiCp reflected obvious impact on refining grain size, and yet, the DRX behavior of Mg matrix influenced by bimodal size SiCp is still unclear.…”

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Dynamic Recrystallization Behavior of Bimodal Size SiCp-Reinforced Mg Matrix Composite during Hot Deformation

Wang

Deng

Zhou

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

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The (submicron ? micron) bimodal size SiCp-reinforced Mg matrix composite was compressed at the temperature of 270-420°C and strain rate of 0.001-1 s -1 . Then, dynamic recrystallization (DRX) behavior of the composite was investigated by thermodynamic method and verified by microstructure analysis. Results illustrated that the composite possess the lower critical strain and higher DRX ratio as compared to monolithic Mg alloys during hot deformation process. The predicted DRX ratio increased with the proceeding of compression, which was well consistent with the experimental value. Results from thermodynamic calculation suggested that the occurrence of DRX could be promoted by SiCp, which would be further proved by microstructure analysis. Formation of particle deformation zone around micron SiCp played a significant role in promoting DRX nucleation. Nevertheless, the distribution of submicron SiCp was increasingly uniform with the proceeding of compression, which could fully restrain grain growth. Therefore, the corporate effects of micron and submicron SiCp on DRX contributed to the improvement of DRXed ratio and the refinement of grain size for the composite during compression process.

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“…10-8.5,'' and the composite was fabricated by stir casting, the details of which had been reported in Ref. [16].…”

Section: Methodsmentioning

confidence: 99%

Section: Analysis About the Drx Mechanism Influenced By Bimodal Size mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Dynamic Recrystallization Behavior of Bimodal Size SiCp-Reinforced Mg Matrix Composite during Hot Deformation

Wang

Deng

Zhou

et al. 2016

Acta Metall. Sin. (Engl. Lett.)

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“…Nano-grains were observed near a B 4 C particle, which was caused by the misfit strain (as shown in square box in Fig. 8a) at the interface between matrix and particles during deformation [26,27]. This misfit strain results in the enforced strain gradient in the matrix near a particle.…”

Section: Materials Preparationmentioning

confidence: 98%

The design, microstructure and tensile properties of B4C particulate reinforced 6061Al neutron absorber composites

Chen

Wang

et al. 2015

Journal of Alloys and Compounds

150

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“…On the other hand, some of the researchers [41,45] suggested that the usage of larger ceramic particles improves some mechanical or physical properties and the use of such particles is preferred in specific applications. Deng et al [46] fabricated bimodal size particle reinforced AZ91 magnesium matrix composites via the stir casting process. They have found that larger particles were more able to produce grain refinement than smaller ones and that the yield strength of the bimodal size SiC/AZ91 composite was higher than that of the single-sized particle reinforced composites.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of rolled A356 based composites reinforced by Cu-coated bimodal ceramic particles

et al. 2015

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ab s t r a c tThree kinds of A356 based composites reinforced with 3 wt.% Al2O3 (average particle size: 170 lm), 3 wt.% SiC (average particle size: 15 lm), and 3 wt.% of mixed Al2O3-SiC powders (a novel composite with equal weights of reinforcement) were fabricated in this study via a two-step approach. This first process step was semi-solid stir casting, which was followed by rolling as the second process step. Electroless deposition of a copper coating onto the reinforcement was used to improve the wettability of the ceramic particles by the molten A356 alloy. From microstructural characterization, it was found that coarse alumina particles were most effective as obstacles for grain growth during solidification. The rolling process broke the otherwise present fine silicon platelets, which were mostly present around the Al2O3 particles. The rolling process was also found to cause fracture of silicon particles, improve the distribution of fine SiC particles, and eliminate porosity remaining after the first casting process step. Examination of the mechanical properties of the obtained composites revealed that samples which contained a bimodal ceramic reinforecment of fine SiC and coarse Al2O3 particles had the highest

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Microstructure and strengthening mechanism of bimodal size particle reinforced magnesium matrix composite

Cited by 247 publications

References 18 publications

Dynamic Recrystallization Behavior of Bimodal Size SiCp-Reinforced Mg Matrix Composite during Hot Deformation

Dynamic Recrystallization Behavior of Bimodal Size SiCp-Reinforced Mg Matrix Composite during Hot Deformation

The design, microstructure and tensile properties of B4C particulate reinforced 6061Al neutron absorber composites

Mechanical properties of rolled A356 based composites reinforced by Cu-coated bimodal ceramic particles

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