Processing and microstructural characterisation of AA 1070 and AA 6063 matrix B4Cp reinforced composites

Toptan, Fatih; Kılıçarslan, Ayfer; Karaaslan, Ahmet; Çiğdem, Mustafa; Kerti, Işıl

doi:10.1016/j.matdes.2009.11.064

Cited by 204 publications

(89 citation statements)

References 24 publications

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“…% fraction of particles reinforcement [7][8]. Many aluminum matrix composites with various matrix compositions, such as AA6061 [9], AA6063 [10], Al-Si-Fe alloys [11], AA1070 and AA6063 [12], AA356 [13], AA6061 [14] have been produced successfully using stir casting technique. A homogeneous distribution and strong bonding of secondary particles in the composite matrix is critical for executing a high strength.…”

Section: A Stir Castingmentioning

confidence: 99%

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Mechanical and Metallurgical Examinations of Stir Cast Aluminum Matrix Composites: A Review Study

Kaushik¹,

Singhaal²

2017

IJET

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Abstract--The drift of research work from monolithic aluminum alloy to composite materials like Metal Matrix Composites (MMC's) is due to the world-wide proviso for economical, high working performance and superior quality materials. Metal matrix composites especially aluminum matrix composites (AMC's) due to their excellent strength with respect to their weight, superior wear resistance, economical and high corrosion resistance are extensively produced and utilized in several applications like, architectural components, structural applications, aerospace, automobile industry, ship building and many sports items and electrical and electronic components. The reinforcements like SiC, B 4 C, Al 2 O 3 , TiB 2 , Red mud, Graphite, Fly ash, and Coconut ash etc. can be easily incorporated as reinforcement agents in the molten melt by employing the economical and widely used stir casting technique, which improves strength, stiffness, fatigue, hardness, wear and creep properties of the AMCs. This paper gives an overview of mechanical, microstructural and wear performances of aluminum centered metal matrix composites produced by stir casting process reinforced with single and multiple types of reinforcements. The problems like reinforcement-metal matrix bonding, distribution of particles, wettability of reinforcing particles and agglomeration phenomenon are discussed in this paper. The effect of various reinforcement particles on aluminum matrix composites on mechanical properties like uts, ys, stiffness, hardness, fatigue, % E, wear and on resulting microstructure is discussed. The Modified and dual step stir casting technique for the fabrication of AMCs is also discussed in this paper. Keywords: Aluminum matrix composite (AMC), stir casting, reinforcement, mechanical properties, wear behavior I. INTRODUCTIONMetal based matrix composites reinforced with ceramic agents have a wide range of applications in aerospace, automobile, structural components and defense sector. Monolithic aluminum alloys have limitations in achieving good combinations of mechanical properties like strength, toughness, stiffness, wear resistance and density. Metal matrix composites are produced to overcome these shortcomings and to encounter the worldwide requirement for light weight materials with higher specific strength, corrosion resistant, high stiffness and excellent wear resistant properties [1][2]. The properties of aluminum alloy like low density, light weight, easy processing technique and fine engineering characterstics favored it as matrix material in MMC's [3]. The aluminum matrix series like AA2xxx, AA5xxx, AA6xxx, and AA7xxx have numerous applications in aerospace, defense instrument, architectural and structural components, automobile, sports good, and ship building [1][2][3][4].For the fabrication of metallic matrix composites several type of manufacturing methods are employed. The choice of appropriate manufacturing method highly alters the resulting composite microstructure, dispersion of ceramic agents, interfacial bonding betwe...

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Section: A Stir Castingmentioning

confidence: 99%

“…The formation of reaction layer was also examined with EDS analysis and X-ray mapping. It was found that the microstructural observation by high resolution field emission gun SEM (FEG-SEM), wetting improved by the formation of very thin TiC and TiB 2 reaction layers [12].…”

Section: B Wettabilitymentioning

confidence: 99%

Mechanical and Metallurgical Examinations of Stir Cast Aluminum Matrix Composites: A Review Study

Kaushik¹,

Singhaal²

2017

IJET

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“…Many researchers discovered aluminium materials and found they exhibit higher strength and stiffness, in addition to isotropic behaviour at a lower density, when compared to the un-reinforced aluminium matrix. [14][15][16] The ceramic's ability to withstand high velocity impacts and the high toughness of the metal matrix, which helps in preventing total shattering, are one of the main reason for AMC strength. The composites possess good mechanical properties at high temperature and thus an AMC can be a favourite choice for cost-effective alternatives and shows potential in large-scale applications such as automotive, aerospace and airframe applications.…”

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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“…In addition, Al-B 4 C composites have low-cost casting for their production. However, the poor wettability of Al below 1000 ºC constitutes an obstacle for adequate mixing of the ceramic particles with the liquid phase [18][19]. It is possible to heat treat or coat the B 4 C particles to improve the wettability factor [20] or control the formation of ternary phases of the Al-B-C system, of which nine ternary phases are known at least [21].…”

Section: Introductionmentioning

confidence: 99%

Study of multi-carbide B₄C-SiC/(Al, Si) reaction infiltrated composites by SEM with EBSD

Almeida

Ferro

Ravanan

et al. 2014

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In the definition of conceptual developments and design of new materials with singular or unique properties, characterisation takes a key role in clarifying the relationships of composition, properties and processing that define the new material. B 4 C has a rare combination of properties that makes it suitable for a wide range of applications in engineering: high refractoriness, thermal stability, high hardness and abrasion resistance coupled to low density. However, the low self-diffusion coefficient of B 4 C limits full densification by sintering. A way to overturn this constraint is by using an alloy, for example Al-Si, forming composites with B 4 C. Multi-carbide B 4 C-SiC/(Al, Si) composites were produced by the reactive melt infiltration technique at 1200 -1350 ºC with up to 1 hour of isothermal temperature holds. Pressed preforms made from C-containing B 4 C were spontaneously infiltrated with Al-Si alloys of composition varying from 25 to 50 wt% Si. The present study involves the characterisation of the microstructure and crystalline phases in the alloys and in the composites by X-ray diffraction and SEM/EDS with EBSD. Electron backscatter diffraction is used in detail to look for segregation and spatial distribution of Si and Al containing phases during solidification of the metallic infiltrate inside the channels of the ceramic matrix when the composite cools down to the eutectic temperature (577 ºC). It complements elemental maps of the SEM/EDS. The production of a flat surface by polishing is intrinsically difficult and the problems inherent to the preparation of EBSD qualified finishing in polished samples of such type of composites are further discussed.

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Processing and microstructural characterisation of AA 1070 and AA 6063 matrix B4Cp reinforced composites

Cited by 204 publications

References 24 publications

Mechanical and Metallurgical Examinations of Stir Cast Aluminum Matrix Composites: A Review Study

Mechanical and Metallurgical Examinations of Stir Cast Aluminum Matrix Composites: A Review Study

Machining parameters influencing in electro chemical machining on AA6061 MMC

Study of multi-carbide B₄C-SiC/(Al, Si) reaction infiltrated composites by SEM with EBSD

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Processing and microstructural characterisation of AA 1070 and AA 6063 matrix B4Cp reinforced composites

Cited by 204 publications

References 24 publications

Mechanical and Metallurgical Examinations of Stir Cast Aluminum Matrix Composites: A Review Study

Mechanical and Metallurgical Examinations of Stir Cast Aluminum Matrix Composites: A Review Study

Machining parameters influencing in electro chemical machining on AA6061 MMC

Study of multi-carbide B4C-SiC/(Al, Si) reaction infiltrated composites by SEM with EBSD

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Product

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Study of multi-carbide B₄C-SiC/(Al, Si) reaction infiltrated composites by SEM with EBSD