Influence of fly ash particles on tensile and impact behaviour of aluminium (Al/3Cu/8.5Si) metal matrix composites

Kumar, K. Ravi; Sundaram, K. Mohana; Subramanian, Ramanathan; Anandavel, B.

doi:10.1515/secm-2013-0006

Cited by 25 publications

(12 citation statements)

References 5 publications

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“…It is also a typical brittle fracture, and the crack is mainly generated at the corner of the coarse Chinese character eutectic Fe 2 Nb phase, as shown in figure 14(d). The current results align with Samal et al [37] and Kumar et al [39].…”

Section: Metallographic Characterization Of Al-5cu-2ni-xfenb Compositessupporting

confidence: 93%

“…Ravikumar et al [28] observed that impact strength reduces with an increasing fraction of tungsten carbide reinforcements in AA6082 alloy. Similar outcomes were reported by other researchers [38,39]. The impact strength of the composites may be enhanced by a secondary process of fabrication such as hot forging [37].…”

Section: Mechanical Characterization Of Al-5cu-2ni-xfenb Compositessupporting

confidence: 88%

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Effect of FeNb on microstructure and mechanical properties of Al-Cu-Ni alloy

Pulisheru

Birru

Dixit

2022

Mater. Res. Express

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The present research work deals with the investigation of mechanical properties and microstructure evaluation by particulate reinforcement of ferroniobium (FeNb) into Al˗5Cu˗2Ni alloy. The two-step stir casting method was employed for the fabrication of the material. The metallography study was carried out with optical microscopy (OM), scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD). The XRD peaks revealed the presence of the Fe2Nb phase and intermetallic compound phases of Al2Cu and Al3Ni2. However, the Fe2Nb phase is in the form of short sticks uniformly distributed around the intermetallic compound phases. Tensile strength, microhardness and impact strength were evaluated according to ASTM standards. The average tensile strength and Vickers microhardness of the Al˗5Cu˗2Ni matrix alloy were 179 MPa and 115 HV respectively. By adding 1%, 3% and 5% of FeNb particulate reinforcement into Al˗5Cu˗2Ni alloy, the tensile strength could be enhanced to 185, 193 and 207 MPa respectively. The corresponding microhardness values were 130, 132 and 151 HV, respectively. Thus, the addition of 5% ferroniobium particulate reinforcement material could significantly enhance the tensile strength and microhardness of the composites. Fractography revealed that fracture mode changes from ductile to brittle with the reinforcement of FeNb particles. The FeNb particles resist the dislocation movement of the intermetallic compound phases in the composites leading to micro-cracks and subsequent brittle fracture.

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Section: Metallographic Characterization Of Al-5cu-2ni-xfenb Compositessupporting

confidence: 93%

Section: Mechanical Characterization Of Al-5cu-2ni-xfenb Compositessupporting

confidence: 88%

Effect of FeNb on microstructure and mechanical properties of Al-Cu-Ni alloy

Pulisheru

Birru

Dixit

2022

Mater. Res. Express

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“…Kok et al [ 28 ] have reported about the effect of Al 2 O 3 particle dispersions in the matrix, the Al 2 O 3 particles with 32 μm particle size had better strength characteristics as compared to 16 μm particle dispersions in the matrix, which is in line with the findings of the present work, viz., the strength increases with the increase in size of inoculant particles. Kumar et al [ 29 ] have reported the findings related to the influence of fly ash reinforcements on the tensile strength of Al/3Cu/8.5Si and have drawn similar inferences of increase in the strength with the increase in wt. % of fly ash attributed to close packing of the reinforcements in the matrix.…”

Section: Resultsmentioning

confidence: 79%

Influence of the Fly Ash Material Inoculants on the Tensile and Impact Characteristics of the Aluminum AA 5083/7.5SiC Composites

Santhosh

Nagegowda

Kumar³

et al. 2021

Materials

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The choice of suitable inoculants in the grain refinement process and subsequent enhancement of the characteristics of the composites developed is an important materials research topic, having wide scope. In this regard, the present work is aimed at finding the appropriate composition and size of fly ash as inoculants for grain refinement of the aluminum AA 5083 composites. Fly ash particles, which are by products of the combustion process in thermal power plants, contributing to the large-scale pollution and landfills can be effectively utilized as inoculants and interatomic lubricants in the composite matrix–reinforcement subspaces synthesized in the inert atmosphere using ultrasonic assisted stir casting setup. Thus, the work involves the study of the influence of percentage and size of the fly ash dispersions on the tensile and impact strength characteristics of the aluminum AA 5083/7.5SiC composites. The C type of fly ash with the particle size in the series of 40–75 µm, 76–100 µm, and 101–125 µm and weight % in the series of 0.5, 1, 1.5, 2, and 2.5 are selected for the work. The influence of fly ash as distinct material inoculants for the grain refinement has worked out well with the increase in the ultimate tensile strength, yield strength, and impact strength of the composites, with the fly ash as material inoculants up to 2 wt. % beyond which the tensile and impact characteristics decrease due to the micro coring and segregation. This is evident from the microstructural observations for the composite specimens. Moreover, the role of fly ash as material inoculants is distinctly identified with the X-Ray Diffraction (XRD) for the phase and grain growth epitaxy and the Energy Dispersive Spectroscopy (EDS) for analyzing the characteristic X-Rays of the fly ash particles as inoculant agents in the energy spectrum.

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“…The comparative evaluation of the ultimate tensile strength of the composite specimens for different compositions of the reinforcements and heat treatment temperatures is given in Figures 9-12. From the graph (Figure 9), it is evident that the ultimate tensile strength of the composites increases with the increase in the wt.% of fly ash due to inoculation accelerated by the thermal exposure of the composites in the post-treatment condition up to a temperature of 160 • C, as ascertained by the findings of the Kumar et al [36], who reported the findings related to the influence of fly ash reinforcements on the tensile strength of Al/3Cu/8.5Si and drew similar inferences of increase in the strength with the increase in wt.% of fly ash attributed to close packing of the reinforcements in the matrix. However, the increase in the thermal exposure temperature to 200 • C leads to a slight decrease in the ultimate tensile strength which can be attributed to the agglomeration of the reinforcements at certain regions in the matrix at an elevated temperature of exposure, as reported in the findings of Kok et al [37] about the effect of thermal exposure on the Al 2 O 3 particle dispersions in the matrix; the Al 2 O 3 particles dispersed in the matrix phase and exposed to a temperature of 150 • C had better strength characteristics, as compared to those aluminium composites with Al 2 O 3 particle dispersions in the matrix subjected to a temperature above 150 • C which is in line with the findings of the present work.…”

Section: Ultimate Tensile Strength (Uts)mentioning

confidence: 76%

Influence of Heat Treatment and Reinforcements on Tensile Characteristics of Aluminium AA 5083/Silicon Carbide/Fly Ash Composites

et al. 2021

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The effect of reinforcements and thermal exposure on the tensile properties of aluminium AA 5083–silicon carbide (SiC)–fly ash composites were studied in the present work. The specimens were fabricated with varying wt.% of fly ash and silicon carbide and subjected to T6 thermal cycle conditions to enhance the properties through “precipitation hardening”. The analyses of the microstructure and the elemental distribution were carried out using scanning electron microscopic (SEM) images and energy dispersive spectroscopy (EDS). The composite specimens thus subjected to thermal treatment exhibit uniform distribution of the reinforcements, and the energy dispersive spectrum exhibit the presence of Al, Si, Mg, O elements, along with the traces of few other elements. The effects of reinforcements and heat treatment on the tensile properties were investigated through a set of scientifically designed experimental trials. From the investigations, it is observed that the tensile and yield strength increases up to 160 °C, beyond which there is a slight reduction in the tensile and yield strength with an increase in temperature (i.e., 200 °C). Additionally, the % elongation of the composites decreases substantially with the inclusion of the reinforcements and thermal exposure, leading to an increase in stiffness and elastic modulus of the specimens. The improvement in the strength and elastic modulus of the composites is attributed to a number of factors, i.e., the diffusion mechanism, composition of the reinforcements, heat treatment temperatures, and grain refinement. Further, the optimisation studies and ANN modelling validated the experimental outcomes and provided the training models for the test data with the correlation coefficients for interpolating the results for different sets of parameters, thereby facilitating the fabrication of hybrid composite components for various automotive and aerospace applications.

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Influence of fly ash particles on tensile and impact behaviour of aluminium (Al/3Cu/8.5Si) metal matrix composites

Cited by 25 publications

References 5 publications

Effect of FeNb on microstructure and mechanical properties of Al-Cu-Ni alloy

Effect of FeNb on microstructure and mechanical properties of Al-Cu-Ni alloy

Influence of the Fly Ash Material Inoculants on the Tensile and Impact Characteristics of the Aluminum AA 5083/7.5SiC Composites

Influence of Heat Treatment and Reinforcements on Tensile Characteristics of Aluminium AA 5083/Silicon Carbide/Fly Ash Composites

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