Preparation and characterization of hybrid A359/(SiC+Si3N4) composites synthesized by stir/squeeze casting techniques

Shalaby, Essam A.M.; Churyumov, A. Yu.; Солонин, А. Н.; Lotfy, Ahmed

doi:10.1016/j.msea.2016.07.058

Cited by 77 publications

(23 citation statements)

References 31 publications

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“…If more free Si atom in the surrounding α-Al matrix, the rate of "6-to-α transformation" increases. Because the 14 diffusion coefficient of Si in α-Al at 500 °C is about1.4 × 10 -13 m 2 s -1 [33], which is much higher than that of Cu and Mn. Si in the matrix diffusing into the Al6(FeMn), which accelerate the eutectoid reaction.…”

Section: A Microstructurementioning

confidence: 91%

“…A new technology of near liquidus squeeze casting, can form globular structure without preparation of semi-solid slurries or billets at near liquidus pouring temperature [32]. The squeeze casting techniques can also been using in the prepared of Al based composites alloys [33,34]. Stir followed by squeeze casting techniques were used to produce A359 composites containing different weight percentage of (SiC + Si3N4) particles [33].…”

Section: Introductionmentioning

confidence: 99%

“…The squeeze casting techniques can also been using in the prepared of Al based composites alloys [33,34]. Stir followed by squeeze casting techniques were used to produce A359 composites containing different weight percentage of (SiC + Si3N4) particles [33]. Microstructures of the composites showed a homogeneous and even distribution of hybrid reinforcements within the matrix.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Si on Fe-rich intermetallic formation and mechanical properties of heat-treated Al–Cu–Mn–Fe alloys

et al. 2017

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The effect of Si on Fe-rich intermetallics formation and mechanical properties of heat-treated squeeze cast Al-5.0Cu-0.6Mn-0.7Fe alloy was investigated.Our results show that increasing Si content promotes the formation of Al15(FeMn)3(SiCu)2 (α-Fe), and varying the morphology of T (Al20Cu3Mn2) where the size decreases and the amount increases. The major reason is that Si promotes heterogeneous nucleation of the intermetallics leading to finer precipitates. Si addition significantly enhances ultimate tensile strength and yield strength of the alloys. The strengthening effect is mainly owing to the dispersoid strengthening by increasing volume fraction of T phase and less harmful α-Fe with a compact structure, which make the cracks more difficult to initiate and propagation during tensile test. The squeeze cast Al-5.0Cu-0.6Mn-0.7Fe alloy with 1.1% Si shows significantly improved mechanical properties than the alloy without Si addition, which has tensile strength of 386 MPa, yield strength of 280 MPa and elongation of 8.6%.

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Section: A Microstructurementioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Si on Fe-rich intermetallic formation and mechanical properties of heat-treated Al–Cu–Mn–Fe alloys

et al. 2017

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“…Strengthening of the aluminum, magnesium or copper alloys with particles, fibers or other types of ceramic reinforcement usually results in increased mechanical properties [1][2][3][4][5]. This has led to the research activity in order to achieve the best possible results in the strengthening of materials [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Impact Strength of Composite Materials Based on EN AC-44200 Matrix Reinforced with Al2O3 Particles

Kurzawa

Kaczmar

2017

Archives of Foundry Engineering

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The paper presents the results of research of impact strength of aluminum alloy EN AC-44200 based composite materials reinforced with alumina particles. The research was carried out applying the materials produced by the pressure infiltration method of ceramic preforms made of Al2O3 particles of 3-6m with the liquid EN AC-44200 Al alloy. The research was aimed at determining the composite resistance to dynamic loads, taking into account the volume of reinforcing particles (from 10 to 40% by volume) at an ambient of 23°C and at elevated temperatures to a maximum of 300°C. The results of this study were referred to the unreinforced matrix EN AC-44200 and to its hardness and tensile strength. Based on microscopic studies, an analysis and description of crack mechanics of the tested materials were performed. Structural analysis of a fracture surface, material structures under the crack surfaces of the matrix and cracking of the reinforcing particles were performed.

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“…Owing to their low density, high specific strength and stiffness, good wear resistance, and good thermal and electrical properties, aluminum alloy matrix composites reinforced with SiC particles (Al/SiC p composites) have attracted increasing attention in the fields of aerospace, automotive, military, electronics, and sports [1][2][3][4]. Among the many fabricating methods, powder metallurgy (PM) is the most promising route because of the uniform distribution of SiC p , controlled SiC p /Al interface, and flexible design of constituents [5,6].…”

Section: Introductionmentioning

confidence: 99%

Tensile Properties and Fracture Behavior of a Powder-Thixoformed 2024Al/SiCp Composite at Elevated Temperatures

Chen

2017

Metals

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Abstract:In the present work, the tensile properties and fracture behavior of a 2024Al composite reinforced with 10 vol % SiC p and fabricated via powder thixoforming (PT) were studied at temperatures ranging from 25 • C to 300 • C with a strain rate of 0.05 s −1 , as well as the PT 2024 alloy. The results indicated that the tensile strengths of both the PT materials were all decreased with increasing the temperature, but the decrease rate of the composite was smaller than that of the 2024 alloy, and the composite exhibited higher tensile strength than that of the 2024 alloy at all of the employed testing temperatures due to the strengthening role of SiC p . Increasing temperature was beneficial for enhancing the ductility of materials, and the maximum elongation was reached at 250 • C. The elongation decrease over 250 • C was attributed to the cavity formation due to the debonding of the SiC p /Al interface and the fracturing of the matrix between SiC p . The fracture of the composite at room temperature initiated from the fracture of SiC p and the debonding of the SiC p /Al interface, but that at high temperatures was dominated by void nucleation and growth in the matrix besides the interface debonding.

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Preparation and characterization of hybrid A359/(SiC+Si3N4) composites synthesized by stir/squeeze casting techniques

Cited by 77 publications

References 31 publications

Effect of Si on Fe-rich intermetallic formation and mechanical properties of heat-treated Al–Cu–Mn–Fe alloys

Effect of Si on Fe-rich intermetallic formation and mechanical properties of heat-treated Al–Cu–Mn–Fe alloys

Impact Strength of Composite Materials Based on EN AC-44200 Matrix Reinforced with Al2O3 Particles

Tensile Properties and Fracture Behavior of a Powder-Thixoformed 2024Al/SiCp Composite at Elevated Temperatures

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