Effect of boron carbide and Kaoline reinforcements on the microstructural and mechanical characteristics of aluminium hybrid metal matrix composite fabricated through powder metallurgy technique

Venkatesh, V. S. S.; Deoghare, Ashish B.

doi:10.1080/2374068x.2021.1945314

Cited by 7 publications

(4 citation statements)

References 30 publications

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“…2, and No. 3 [30]. The average hardness of the compact slices is measured using the Rockwell hardness test as per the ASTM E18-15 standard.…”

Section: Methodsmentioning

confidence: 99%

Comparison of single action die and floating die for compaction of aluminum alloy AA7075 using simulation and experimental study

Al Njjar,

Mazloum,

Sata

2024

Eng. Res. Express

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Compaction in powder metallurgy is considered to be one of the most critical steps in achieving the desired properties of green (before sintering) and final (after sintering) compacts that further play a very important role in final products manufactured using powder metallurgy. In this work, compaction was carried out using a single-action die and floating die (necessary pressure is applied from either the upper or lower punch). Simulations have been conducted with considering various loading conditions (20 to 200 kN) and friction coefficient (0 to 0.5 in the steps of 0.1) using both types of dies for manufacturing compacts of Aluminum alloy AA7075 as its demand in aerospace applications has been increased drastically in recent times. It was found from the simulated results that, to ensure satisfactory compaction using a single action die, the compaction load must be ≥ 100 kN, and the friction coefficient < 0.3. While, for a floating die, load ≥ 50 kN, and friction coefficient as zero. It was also found, that a single action die is not advisable to manufacture compact of especially Aluminum alloy AA7075 with a high aspect ratio (H/d > 1.5) in comparison with a floating die. It was also validated by experimental results. It was also observed that floating die compaction results in homogeneous physical, and mechanical properties as well as better microstructure. The compressive strength of the sintered compact is observed to be as high as 60% greater for the floating die compared to the single-action die. Moreover, it was improved by 94.14% compared to previous studies. Additionally, it was found that the effectiveness of the floating pressing die lies in its ability to achieve compaction without the complexity of a double-action system, offering practical implications for optimizing powder metallurgy processes and reducing costs.

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“…2, and No. 3 [30]. The average hardness of the compact slices is measured using the Rockwell hardness test as per the ASTM E18-15 standard.…”

Section: Methodsmentioning

confidence: 99%

Comparison of single action die and floating die for compaction of aluminum alloy AA7075 using simulation and experimental study

Al Njjar,

Mazloum,

Sata

2024

Eng. Res. Express

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“…The pores restrict the heat flow during the sintering process and act as a micro-crack through which the crack originates and spreads. 24,34 The presence of a temperature mismatch between the matrix and the reinforcements creates variation in the elongation potentiality between the matrix and reinforcements. These discrepancies lead to the generation of voids in the boundary regions of the material.…”

Section: Porosity For the Synthesized Compositementioning

confidence: 99%

“…Synthesized composites were tested mechanically by performing a tensile test as per ASTM E8 standards, compression test according to ASTM E9 standards on the micro Universal Testing Machine (U.T.M) of the M30 model. 24,25 The Vickers hardness test was carried out in accordance with the ASTM E384-16 specifications on the ECONOMET VH1MD Vickers Microhardness testing instrument with a load of 25 N and a dwell time of 10 s. 9,26 The porosity and density of the developed composites were measured using Archimedes’ principle and rule of mixtures method respectively. 27 The elemental constituents and the reinforcement distribution were identified by conducting XRD and SEM analysis for the synthesized composite.…”

Section: Characterization Of the Synthesized Compositementioning

confidence: 99%

Influence of microwave sintering temperatures on mechanical and microstructural Behavior of Al/SiC/snail shell hybrid composite synthesized through powder metallurgy technique

Venkatesh¹,

Rao

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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This study emphasizes the synthesis of hybrid aluminum composite reinforced with SiC and Snail Shell (S-Shell) particles through the powder metallurgy technique. The hybrid composite corresponding to the optimized volume fraction of SiC and Snail shell powder (Al-6%SiC-6%S-Shell) was subjected to microwave-assisted sintering (MAS) by varying the sintering temperatures from 400°C to 550°C in steps of 50°C. Results concluded that microwave-sintered composites show superior mechanical characteristics than the composites sintered through conventional sintering techniques. The maximum ultimate tensile strength (U.T.S) of 316 MPa, and compression strength of 396 MPa were obtained for microwave sintered Al-6%SiC-6%Snail shell powder composite sintered at 500°C. However, increasing the sintering temperature above 500°C leads to a reduction in U.T.S and Compression strength due to the formation of coarse grains by absorbing the microwaves at higher temperatures. The U.T.S, Compression strength and Vickers hardness of the microwave sintered Al-6%SiC-6%Snail shell powder hybrid composite sintered at 500°C was enhanced by 42.08%, 42.4%, and 35.5% compared to conventionally sintered hybrid composite. The grain size was found to be increased with an increase in microwave sintering temperature due to the enhancement in the absorption capability of the microwaves with the temperature rise. The results of this study also suggest that choosing materials with a high microwave response helps to achieve improved mechanical properties for microwave-sintered composites.

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“…the powder metallurgy technique typically results in the creation of these voids during the compaction process. the existence of porosity in the material deteriorates the interface bonding between the interface particles which negatively affects the mechanical characteristics of the composite [25]. these air gaps obstruct the heat transfer during the sintering and lead to improper sintering of the composite [26].…”

Section: Porosity Of the Synthesized Compositesmentioning

confidence: 99%

Archives of Metallurgy and Materials

2022

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CharaCterization of MiCrowave Sintered aluMiniuM CoMpoSite reinforCedwith hydroxyapatite extraCted froM rihu fiSh SCaleS in this study, hydroxyapatite (hap) is extracted from the rihu fish scales which are generally dumped as garbage. the aluminium composite was fabricated through the powder metallurgy technique by reinforcing hap (0, 5, 10 and 15 wt%) as a reinforcement. The fabricated samples were sintered through microwave sintering at 530℃ for 15 min under an argon gas environment. the fabricated composites were subjected to X-ray diffraction (Xrd), Scanning electron Microscopy (SeM) and energy dispersive Spectroscopy (edS) analysis to confirm the constituting elements and to describe the reinforcement dispersion in the matrix. Uniform reinforcement dispersion was observed for the composite reinforces with 5%hap, 10%hap particles. the mechanical characterization results reveal that the al-10% hap composite exhibits a microhardness value of 123 ± 3 hv and maximum ultimate tensile strength of 263 ± 10 Mpa and 299 ± 9 Mpa compression strength was obtained due to the presence of a strong bond among the aluminium and hap particles.

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Effect of boron carbide and Kaoline reinforcements on the microstructural and mechanical characteristics of aluminium hybrid metal matrix composite fabricated through powder metallurgy technique

Cited by 7 publications

References 30 publications

Comparison of single action die and floating die for compaction of aluminum alloy AA7075 using simulation and experimental study

Comparison of single action die and floating die for compaction of aluminum alloy AA7075 using simulation and experimental study

Influence of microwave sintering temperatures on mechanical and microstructural Behavior of Al/SiC/snail shell hybrid composite synthesized through powder metallurgy technique

Archives of Metallurgy and Materials

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