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

Khosroshahi, Negin; Mousavian, R. Taherzadeh; Khosroshahi, R. Azari; Brabazon, Dermot

doi:10.1016/j.matdes.2015.06.027

Cited by 56 publications

(36 citation statements)

References 49 publications

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“…Different methods have been suggested to overcome this problem, including semi-solid stirring [5] and ball milling with ultrasonic treatment [6] but they have not been very successful. This is attributed to the fact that they have mainly concentrated on the deagglomeration of nanoparticles when they are mixing with the metallic alloy during the manufacturing process rather than in their as-received state, diminishing the efficiency of the process due to the lower wettability of these nanoparticles with most metal matrices [5,7,8]. Most importantly, these studies suffer from exploiting thermal models to predict the interaction of the nanoparticles with the solid/liquid interface during solidification.…”

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confidence: 99%

Strengthening mechanisms of graphene sheets in aluminium matrix nanocomposites

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Strengthening mechanisms of graphene sheets in aluminium matrix nanocomposites

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“…The A356 alloy (475 ± 5 g) was heated to 640 °C using a resistance furnace in order to have uniform melt con-dition. The melt was then cooled to 600 °C corresponding to a 0.3 solid fraction, based on analysis with Thermo-Calc software which was shown in our previous study [2].…”

Section: Methodsmentioning

confidence: 99%

“…The use of Al-Si (in particular A356) alloys in the manufacture of au-tomotive engine components has increased considerably in recent years [1][2][3][4][5][6]. Although high-strength aluminum alloys have been developed, the addition of alloying elements and microstructural modification, can be costly, contain toxic elements, and often results in properties, which only result in a slight increase in stiffness.…”

Section: Introductionmentioning

confidence: 99%

“…Although high-strength aluminum alloys have been developed, the addition of alloying elements and microstructural modification, can be costly, contain toxic elements, and often results in properties, which only result in a slight increase in stiffness. The demands for lightweight, highmodulus, and high-strength materials have therefore led to the development of aluminum matrix nanocomposites (AMNCs) [2,[7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of aluminum matrix composites reinforced with nano- to micrometer-sized SiC particles

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ab s t r a c tIn this study, the hot extrusion process was applied to stir cast aluminum matrix-SiC composites in order to im-prove their microstructure and reduce cast part defects. SiC particles were ball milled with Cr, Cu, and Ti as three forms of carrier agents to improve SiC incorporation. Large brittle ceramic particles (average particle size: 80 μm) were fragmented during ball-milling to form nanoparticles in order to reduce the cost of composite manufactur-ing. The experimental results indicate that full conversion of coarse micron sized to nanoparticles, even after 36 h of ball milling, was not possible. Multi modal SiC particle size distributions which included SiC nanoparticles were produced after the milling process, leading to the incorporation of a size range of SiC particle sizes from about 50 nm to larger than 10 μm, into the molten A356 aluminum alloy. The particle size of the milled powders and the amount of released heat from the reaction between the carrier agent and molten aluminum are inferred as two crucial factors that affect the resultant part tensile properties and microhardness.

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“…This is due to the fact that AMCs are light and have good specific strength and stiffness. Thus, these new materials can be an appropriate option for replacement of the heavy alloys such as steels [1][2][3][4][5][6][7][8] .…”

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Effect of reinforcement amount, mold temperature, superheat, and mold thickness on fluidity of in-situ Al-Mg2Si composites

Barenji

2018

China Foundry

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A luminum matrix composites (AMCs) are frequently used in different industries. This is due to the fact that AMCs are light and have good specific strength and stiffness. Thus, these new materials can be an appropriate option for replacement of the heavy alloys such as steels [1][2][3][4][5][6][7][8] .AMCs can be produced using casting methods such as ex-situ and in-situ processes. In the ex-situ process, reinforcement particles are added to the molten metal, usually accompanied by a stirring action. In the insitu process, the reinforcements of secondary phase are produced either in molten metal or in solidification. Therefore, the wetting problem of the secondary phases is solved by the in-situ method, and hence the distribution of the reinforcements is more uniform than that of the ex-situ method. This advantage of the in-situ Abstract: In the present study, the effects of mold temperature, superheat, mold thickness, and Mg 2 Si amount on the fluidity of the Al-Mg 2 Si as-cast in-situ composites were investigated using the mathematical models. Composites with different amounts of Mg 2 Si were fabricated, and the fluidity and microstructure of each were then analyzed. For this purpose, the experiments were designed using a central composite rotatable design, and the relationship between parameters and fluidity were developed using the response surface method. In addition, optical and scanning electron microscopes were used for microstructural observation. The ANOVA shows that the mathematical models can predict the fluidity accurately. The results show that by increasing the mold temperature from 25 °C to 200 °C, superheat from 50 °C to 250 °C, and thickness from 3 mm to 12 mm, the fluidity of the composites decreases, where the mold thickness is more effective than other factors. In addition, the higher amounts of Mg 2 Si in the range from 15wt.% to 25wt.% lead to the lower fluidity of the composites. For example, when the mold temperature, superheat, and thickness are respectively 100 °C, 150 °C, and 7 mm, the fluidity length is changed in the range of 11.9 cm to 15.3 cm. By increasing the amount of Mg 2 Si, the morphology of the primary Mg 2 Si becomes irregular and the size of primary Mg 2 Si is increased. Moreover, the change of solidification mode from skin to pasty mode is the most noticeable microstructural effect on the fluidity.

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

Cited by 56 publications

References 49 publications

Strengthening mechanisms of graphene sheets in aluminium matrix nanocomposites

Strengthening mechanisms of graphene sheets in aluminium matrix nanocomposites

Fabrication of aluminum matrix composites reinforced with nano- to micrometer-sized SiC particles

Effect of reinforcement amount, mold temperature, superheat, and mold thickness on fluidity of in-situ Al-Mg2Si composites

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