Effect of compaction pressure on mechanical properties of AA7075/B4C/graphite hybrid composite fabricated by powder metallurgy techniques

Manohar, Guttikonda; Pandey, Krishna Murari; Maity, Saikat Ranjan

doi:10.1016/j.matpr.2020.05.194

Cited by 30 publications

(14 citation statements)

References 13 publications

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“…Ball milling was performed in RESTECH 100 planetary ball mill at a speed of 300 rpm for 3 h to disperse the reinforcements uniformly throughout the matrix and to induce the strain hardening effect in the powder particles. The entire ball milling setup was sealed with inert gas (Ar) atmosphere to prevent the contamination and oxidation of aluminium powder during the milling process [21,22]. These milled powders were charged into a graphite die and subjected to the simultaneous application of 35 MPa pressure and 2 KW power supply by using an automated SPS machine (FCT syateme, HP D-5 type, Rauenstein, Germany) [23].…”

Section: Methodsmentioning

confidence: 99%

Tribological Investigation of Self-Lubricated Al-SiC-Kaoline Hybrid Composite Under Dry, Oil and Nanofluids Lubricating Conditions Fabricated Through Spark Plasma Sintering Technique.

Vavilada

Deoghare

2021

Preprint

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In this present study Al-10% SiC- X % Kaoline (X= 0, 2, 4, 6, 8) HMMC synthesized by spark plasma sintering technique. The fabricated HMMC samples corresponding to maximum compression strength was subjected to tribological investigation under dry, oil and nanofluids lubricating conditions. Nanofluid lubricants were developed by incorporating SiC nanoparticles with weight percentages of 1 wt%, 1.5 wt% and 2 wt% into the soluble oil. The thermal conductivity was found to be increased with increasing the wt % of SiC nanoparticles and the maximum thermal conductivity of 0.771 W/m.K was obtained for the nanofluids with 2 wt% SiC nanofluids. Sliding wear test was conducted on the pin-on-disc tribometer at 40 N load and sliding speed of 1500 r.p.m for a sliding of 180 s. Results reveal that there was a significant effect of the lubricating conditions (dry, oil and nanofluids) on the wear and C.O.F of the HMMC pin surface. The minimum wear of 119 microns and minimum C.O.F of 0.11 was obtained for nanofluid with 2 wt% SiC nanofluid lubricating conditions. SEM analysis of worn surface under dry and soluble oil lubricating conditions reveal the presence of microcracks and delaminations wear. However, worn surface with smooth grooves and absence of microcracks was identified under nanofluid lubricating conditions.

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Section: Methodsmentioning

confidence: 99%

Tribological Investigation of Self-Lubricated Al-SiC-Kaoline Hybrid Composite Under Dry, Oil and Nanofluids Lubricating Conditions Fabricated Through Spark Plasma Sintering Technique.

Vavilada

Deoghare

2021

Preprint

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“…Notably, the high compaction pressures at low rates (quasi static compaction) reduces the porosity levels in the materials as compared to high compaction rates (dynamic compaction) [19]. In order to minimize the porosity levels, in this present work, a high compaction pressure of 600 MPa was applied at low compaction rates [41].…”

Section: Porosity and Density Levelsmentioning

confidence: 99%

“…Studies have revealed that the porosity levels and interface bond strength of the composite material can be improved by applying high compaction pressures. On the other hand, the moderate sintering temperatures help in lowering the ow stress levels in the matrix materials and reduce the voids between the reinforcement particles [19,20].…”

Section: Introductionmentioning

confidence: 99%

Effect of Variations in Microwave Processing Temperatures on Microstructural and Mechanical Properties of AA7075/SiC/Graphite Hybrid Composite Fabricated by Powder Metallurgy Techniques

Manohar¹,

Pandey

Maity

2022

Silicon

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Due to the demand in present industrial, aerospace, defense sectors for lightweight high-performance aluminum (Al) particle-reinforced metal matrix composites, the advancement of techniques to fabricate these composites with superior mechanical properties have gained technological interest in the modern world. In this direction, SiC and graphite reinforced AA7075 matrix composite material has been fabricated in this study, through hybrid microwave sintering techniques. The microwave sintering temperatures for the optimized volume fraction composition of AA7075/SiC/graphite hybrid composite has been varied from 400 to 550 ℃ with a step value of 50 ℃. The obtained results showed a superior improvement in the mechanical properties for microwave sintered composites as compared to the conventionally sintered composites. Mechanical properties are found to show increasing trend with increasing microwave sintering temperatures up to 500 ℃, after that, a downfall is observed in their mechanical properties, which can be attributed to the increased average grain size of the composite at 550 ℃. Selection of SiC as primary reinforcement material helped in achieving high mechanical strengths, and through microwave sintering, an increment of 37.2% in tensile, 26.6% in compression, and 16.5% in hardness is achieved. From this investigation, it is also observed that the selection of materials that shows high response to microwaves helps in achieving the enhanced mechanical properties for the hybrid composites processed by microwave sintering techniques.

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“…Composite materials made from aluminum are the leading candidates because of their lightweight, rust resistance, good conductivity, environmentally friendly, recyclable properties, and ability to bind the reinforcement well [3]. Aluminum composites can be reinforced by adding rigid ceramic or metal reinforcement such as B4C, SiC, Graphite, CNT, Graphene, TiC, Al2O3, Cu, Fe, and others [4,5]. Various composite fabrication methods include stir casting, compo casting, powder metallurgy, friction stir process, roll bonding, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Various composite fabrication methods include stir casting, compo casting, powder metallurgy, friction stir process, roll bonding, etc. Powder metallurgy offers the advantages of an economical process with low process energy, close to the final product, low material waste, high production speed and ease of controlling the final product properties from process parameters [5,6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Graphite Addition on Aluminum Hybrid Matrix Composite by Powder Metallurgy Method

Syahid¹,

Hayat²,

Aswar³

2022

RCMA

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The requirement for optimal strength and lightweight materials is a challenge in today's automotive industry. In this study, the synthesis of aluminum matrix hybrid composites containing magnesium and copper with the addition of graphite 0, 1, 3, and 5% by volume was carried out using powder metallurgy techniques and investigated the effect of the treatment given. The investigation of composite properties was carried out by testing density, porosity, hardness, wear rate, XRD, and SEM investigations integrated with EDS. Optimal conditions indicated composite with a content of 5% volume of graphite with the lowest porosity level of 5.10%, the relative density of 88.67%, and the highest hardness at 50.37 HV, followed by superior wear resistance. This result is supported by observing secondary phase formation and microstructure through XRD and SEM-EDS. The addition of graphite in the composite supports optimizing physical and mechanical properties as a lightweight composite. It deserves to be considered as an alternative material for automotive components.

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Effect of compaction pressure on mechanical properties of AA7075/B4C/graphite hybrid composite fabricated by powder metallurgy techniques

Cited by 30 publications

References 13 publications

Tribological Investigation of Self-Lubricated Al-SiC-Kaoline Hybrid Composite Under Dry, Oil and Nanofluids Lubricating Conditions Fabricated Through Spark Plasma Sintering Technique.

Tribological Investigation of Self-Lubricated Al-SiC-Kaoline Hybrid Composite Under Dry, Oil and Nanofluids Lubricating Conditions Fabricated Through Spark Plasma Sintering Technique.

Effect of Variations in Microwave Processing Temperatures on Microstructural and Mechanical Properties of AA7075/SiC/Graphite Hybrid Composite Fabricated by Powder Metallurgy Techniques

Effect of Graphite Addition on Aluminum Hybrid Matrix Composite by Powder Metallurgy Method

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