The influence of pure Na on the microstructure and tensile properties of Al-Mg2Si metal matrix composite

Emamy, M.; Khorshidi, R.; Honarbakhsh-Raouf, A.

doi:10.1016/j.msea.2011.02.010

Cited by 87 publications

(35 citation statements)

References 17 publications

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“…Research & Development CHINA FOUNDRY Another effective factor on the fracture behavior is particle size. Previous results [3,27] indicate an increase in strength and ductility by decreasing particle size. Figure 6(c), 6(d) and 6(e), clearly depicts the particle decohesion and particle fracture marked by red arrows in the Mg 2 Si/Mg-4Si composite modified with 4.0wt.% modifier.…”

Section: Fracture Characteristicsmentioning

confidence: 83%

“…6. Basically, damage in particulate metal matrix composite (PMMCs) generally occurs at two types, particle decohesion and particle fracture [3] . When stress is applied, the matrix deforms plastically, gradually transferring stress to the particles.…”

Section: Fracture Characteristicsmentioning

confidence: 99%

“…R ecently, metal matrix composites (MMCs) have attracted extensive attention in automobile industry, in order to meet the demands of weight reduction and fuel economization [1][2][3] . The hypereutectic Mg-Si particulate metal matrix composites (PMMCs) have high potential as structural materials because the reinforcing particulate Mg 2 Si intermetallic exhibits a low density of 1.99×10 3 kg • m -3 , a high elastic modulus of 120 GPa, a high melting temperature of 1,085 °C, a high hardness of 4.5×10 9 N • m -2 and a low thermal expansion coefficient of 7.5×10 -6 K -1 [4,5] .…”

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confidence: 99%

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Modification effect of calcium-magnesia phosphate fertilizer on microstructure and mechanical properties of Mg2Si/Mg-4Si composite

et al. 2016

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R ecently, metal matrix composites (MMCs) have attracted extensive attention in automobile industry, in order to meet the demands of weight reduction and fuel economization [1][2][3] . The hypereutectic Mg-Si particulate metal matrix composites (PMMCs) have high potential as structural materials because the reinforcing particulate Mg 2 Si intermetallic exhibits a low density of, a high elastic modulus of 120 GPa, a high melting temperature of 1,085 °C, a high hardness of 4.5×10 9 N • m -2 and a low thermal expansion coefficient of. However, as in-situ Mg 2 Si reinforced PMMCs, hypereutectic Mg-Si alloys do not have satisfactory mechanical properties in general, due to the exhibition of coarse dendritic primary Mg 2 Si particles and the brittle Chinese script shape eutectic Mg 2 Si phases [5,6] . It was proposed that a modification process seems to be the Abstract: In order to modify in-situ synthesized Mg 2 Si particles in Mg 2 Si/Mg-4Si composite, the modification effect of calcium-magnesia phosphate fertilizer on primary Mg 2 Si phase in Mg 2 Si/Mg-4Si composite was investigated by means of X-ray diffraction (XRD), optical microscopy (OM), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analysis. The results indicate that the morphology of the primary Mg 2 Si phase apparently changes from coarse dendrites to fine dispersive polygonal particles, and the mean size is decreased from 277 μm to 17 μm. With the addition of 4.0wt.% calcium-magnesia phosphate fertilizer as a modifier, the ultimate tensile strength and elongation of the Mg 2 Si/Mg-4Si composite are increased from 78.7 MPa and 2.1% to 105.2 MPa and 2.6%, as compared to those of the base composite, which is probably attributed to the formation of the phosphorous compound and the cluster of Ca compounds that acted as the heterogeneous nucleation substrates of the primary Mg 2 Si particles, resulting in a refined distribution of these precipitates.

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Section: Fracture Characteristicsmentioning

confidence: 83%

Section: Fracture Characteristicsmentioning

confidence: 99%

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confidence: 99%

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Modification effect of calcium-magnesia phosphate fertilizer on microstructure and mechanical properties of Mg2Si/Mg-4Si composite

et al. 2016

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“…Therefore, an extensive literature survey has been performed for available experimental results [22][23][24][25][26][27][28][29][30][31]. The experimental datasets are divided into three sets as training, validation and test dataset to avoid the over fitting problems.…”

Section: Results and Explicit Formulation Of Nn Modelmentioning

confidence: 99%

Formulation of the Effect of Different Alloying Elements on the Tensile Strength of the in situ Al-Mg2Si Composites

Kurt

Oduncuoğlu

2015

Metals

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Abstract:In this paper, the effect of different alloying elements on the ultimate tensile strength of Al-Mg2Si composites is theoretically studied. The feed forward back propagation neural network with sigmoid function is used. The extensive experimental results taken from literature are modeled and mathematical formula is presented in explicit form. In addition, it is observed that magnesium and copper have a stronger effect on the ultimate tensile strength of Al-Mg2Si composites comparison to other alloying elements. The proposed model shows good agreement with test results and can be used to find the ultimate tensile strength of Al-Mg2Si composites.

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“…Several investigations have been carried out for the modification of primary and eutectic Mg 2 Si crystals in Al-Mg 2 Si or Al-Si-Mg 2 Si composites by adding P [2], Sr [3], and RE, such as Y [4] and Ce [5,6], Li [7], Na [8], and and K [9] to the liquid alloys. Y and Ce have been shown to be an effective modifier of Mg 2 Si.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and dry sliding wear behavior of cast Al–Mg2Si in-situ metal matrix composite modified by Nd

Zhang

2013

Rare Met.

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The microstructure and dry sliding wear behavior of cast Al-18 wt% Mg 2 Si in-situ metal matrix composite modified by Nd were investigated. Experimental results show that, after introducing a proper amount of Nd, both primary and eutectic Mg 2 Si in the Al-18 wt% Mg 2 Si composite are well modified. The morphology of primary Mg 2 Si is changed from irregular or dendritic to polyhedral shape, and its average particle size is significantly decreased. Moreover, the morphology of the eutectic Mg 2 Si phase is altered from flake-like to very short fibrous or dot-like. The wear rates and friction coefficient of the composites with Nd are lower than those without Nd. Furthermore, the addition of 0.5 wt% Nd changes the wear mechanism of the composite from the combination of abrasive, adhesive, and delamination wear without Nd into a single mild abrasion wear with 0.5 wt% Nd.

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The influence of pure Na on the microstructure and tensile properties of Al-Mg2Si metal matrix composite

Cited by 87 publications

References 17 publications

Modification effect of calcium-magnesia phosphate fertilizer on microstructure and mechanical properties of Mg2Si/Mg-4Si composite

Modification effect of calcium-magnesia phosphate fertilizer on microstructure and mechanical properties of Mg2Si/Mg-4Si composite

Formulation of the Effect of Different Alloying Elements on the Tensile Strength of the in situ Al-Mg2Si Composites

Microstructure and dry sliding wear behavior of cast Al–Mg2Si in-situ metal matrix composite modified by Nd

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