Microstructural variations in cast B4C-reinforced aluminium matrix composites (AMCs)

Kerti, Işıl; Toptan, Fatih

doi:10.1016/j.matlet.2007.08.015

Cited by 200 publications

(79 citation statements)

References 4 publications

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“…SiC p reinforced AMCs have been a hot research issue in recent years because of their excellent properties such as low density, high tensile strength, high elastic modulus and wear resistance, etc. [5][6][7]. For example, SiC p reinforced AMCs are used for engine piston, and heat sink [8,9].…”

Section: Introductionmentioning

confidence: 99%

Microstructures and Tensile Properties of Al–Cu Matrix Composites Reinforced with Nano-Sized SiCp Fabricated by Semisolid Stirring Process

Qiu

Gao

Tang

et al. 2017

Metals

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Abstract:The nano-sized SiC p /Al-Cu composites were successfully fabricated by combining semisolid stirring with ball milling technology. Microstructures were examined by an olympus optical microscope (OM), field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM). Tensile properties were studied at room temperature. The results show that the α-Al dendrites of the composites were strongly refined, especially in the composite with 3 wt. % nano-sized SiC p , of which the morphology of the α-Al changes from 200 µm dendritic crystal to 90 µm much finer equiaxial grain. The strength and ductility of the composites are improved synchronously with the addition of nano-sized SiC p particles. The as-cast 3 wt. % nano-sized SiC p /Al-Cu composite displays the best tensile properties, i.e., the yield strength, ultimate tensile strength (UTS) and fracture strain increase from 175 MPa, 310 MPa and 4.1% of the as-cast Al-Cu alloy to 220 MPa, 410 MPa and 6.3%, respectively. The significant improvement in the tensile properties of the composites is mainly due to the refinement of the α-Al dendrites, nano-sized SiC p strengthening, and good interface combination between the SiC p and Al-Cu alloys.

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Section: Introductionmentioning

confidence: 99%

Microstructures and Tensile Properties of Al–Cu Matrix Composites Reinforced with Nano-Sized SiCp Fabricated by Semisolid Stirring Process

Qiu

Gao

Tang

et al. 2017

Metals

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“…; therefore, they have been widely used in aerospace, military weapons, structural applications, and automobile products [1][2][3][4][5][6][7]. Boron carbide (B 4 C) has a low density (2.52 g/cm 3 ), extremely high hardness, excellent chemical resistance, and a high neutron absorption cross-section [1,2,[8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Boron carbide (B 4 C) has a low density (2.52 g/cm 3 ), extremely high hardness, excellent chemical resistance, and a high neutron absorption cross-section [1,2,[8][9][10][11][12][13]. B 4 C-Al composites have the potential to combine the high toughness and hardness of B 4 C with the good ductility and lightweight structure of the Al matrix; thus, they have been recently investigated for various applications in high-strength structural materials, armor plate materials, substrate materials for computer hard disks, and neutron absorber materials in nuclear industries [7,11,14,15].…”

Section: Introductionmentioning

confidence: 99%

B4C-Al Composites Fabricated by the Powder Metallurgy Process

et al. 2017

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Featured Application: Neutron absorber materials are used in spent-fuel storage racks, storage, and transportation casks to control the reactivity of spent nuclear fuel, allowing the storage and shipment of spent fuel at maximum packing density. Due to the large thermal neutron absorption cross-section of the nuclide B-10 and the excellent mechanical performance of aluminum, B 4 C-Al composites have the potential to serve as the neutron absorber as well as the structural function in fuel racks. This work provides an efficient method to fabricate the homogeneously mixed B 4 C-Al composites with superior yield and tensile strength.Abstract: Due to the large thermal neutron absorption cross section of 10 B, B 4 C-Al composites have been used as neutron absorbing materials in nuclear industries, which can offer not only good neutron shielding performance but also excellent mechanical properties. The distribution of B 4 C particles affects the mechanical performance and efficiency of the thermal neutron absorption of the composite materials. In this study, 15 wt % B 4 C-Al and 20 wt % B 4 C-Al composites were prepared using a powder metallurgy process, i.e., ball milling followed by pressing, sintering, hot-extrusion, and hot-rolling. The yield and tensile strengths of the composites were markedly increased with an increase in the milling energy and the percentages of B 4 C particles. Microstructure analysis and neutron radiography revealed that the high-energy ball milling induced the homogeneous distribution of B 4 C particles in the Al matrix and good bonding between the Al matrix and the B 4 C particles. The load transfer ability and mechanical properties of the composites were consequently improved. The results showed the high-energy ball milling process is an appropriate fabrication procedure to prevent the agglomeration of the reinforcement particles even if the matrix to reinforcement particle size ratio was nearly 10.

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“…These factors combined with a density less than that of solid aluminium indicate that large specific property improvements are possible. 26 Boron-carbide-particulate-reinforced aluminium composites possessed a unique combination of high specific strength, high elastic modulus, good wear resistance and good thermal stability compared to the corresponding non-reinforced matrix alloy system. 27 This study covers the fabrication and machining of an aluminium-based MMC reinforced with SiC particles.…”

Section: Introductionmentioning

confidence: 99%

Machining parameters influencing in electro chemical machining on AA6061 MMC

Mariapushpam¹,

Ravindran²,

Anand³

2016

Mater. Tehnol.

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In this study the mechanical and microstructural behaviours of AA6061 reinforced with silicon carbide (SiC) and AA6061 reinforced with boron carbide (B4C), obtained from the enhanced stir-casting process, were investigated using scanning electron microscopy (SEM) and X-ray diffraction (XRD) with various weight percentages, i.e., 2.5 %, 5 % and 7.5 %. The testing shows that the tensile and microhardness properties of the AA6061 were improved in both the reinforced aluminium-matrix composites. The influence of the electrochemical machining process parameters like current, voltage, electrolyte concentration, feed rate, gap and flow rate were considered as the input parameters. The output responses are the material removal rate (MRR), the surface roughness (SR) and the radial overcut (ROC). The study shows that the dominant output parameter MRR was directly proportional to the input parameters current, voltage and feed rate. The SR was significantly influenced by the input parameters current, feed rate and gap. The ROC was considerably balanced by the input parameters current and feed rate. Keywords: metal-matrix composites, material removal rate, electrochemical machining, surface roughness, radial overcut V {tudiji so bile preiskovane mehanske lastnosti in mikrostruktura AA6061, izdelanega z naprednim postopkom ulivanja s preme{avanjem in oja~anega z razli~nim masnim dele`em silicijevega karbida (SiC) ali borovega karbida (B4C) (2,5 %, 5 % in 7,5 %). Preiskave so bile izvedene s pomo~jo vrsti~nega elektronskega mikroskopa (SEM) in z rentgensko difrakcijo (XRD). Preizku{anje ka`e, da sta natezna trdnost in mikrotrdota AA6061 narasli pri obeh vrstah kompozita na osnovi aluminija. Za vpliv vhodnih procesnih parametrov pri elektrokemijski strojni obdelavi so bili upo{tevani: tok, napetost, koncentracija elektrolita, hitrost podajanja, re`a in hitrost pretoka. Izhodni odgovori so bili: hitrost odstranjevanja materiala (MRR), hrapavost povr{ine (SR) in pove~anje radiusa (ROC). [tudija ka`e, da je prevladujo~i izhodni parameter MRR neposredno proporcionalen vhodnim parametrom; toku, napetosti in hitrosti podajanja. Na SR so mo~no vplivali vhodni parametri: tok, hitrost podajanja in re`a. ROC je bil posebej uravnote`en z vhodnima parametroma, tokom in hitrostjo podajanja. Klju~ne besede: kompoziti na kovinski osnovi, hitrost odstranjevanja materiala, elektrokemijska strojna obdelava, hrapavost povr{ine, pove~anje radiusa

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Microstructural variations in cast B4C-reinforced aluminium matrix composites (AMCs)

Cited by 200 publications

References 4 publications

Microstructures and Tensile Properties of Al–Cu Matrix Composites Reinforced with Nano-Sized SiCp Fabricated by Semisolid Stirring Process

Microstructures and Tensile Properties of Al–Cu Matrix Composites Reinforced with Nano-Sized SiCp Fabricated by Semisolid Stirring Process

B4C-Al Composites Fabricated by the Powder Metallurgy Process

Machining parameters influencing in electro chemical machining on AA6061 MMC

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