Microstructure and Mechanical Properties of Al 6061/Al2O3/Fly-Ash Composite Fabricated Through Stir Casting

Dwivedi, Shashi Prakash; Srivastava, Ashish Kumar; Maurya, Nagendra Kumar; Maurya, Manish

doi:10.18280/acsm.430510

Cited by 21 publications

(5 citation statements)

References 23 publications

(23 reference statements)

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“…In addition to the uniform dispersal of the fly ash and carbonized eggshell particles, the improvement in tensile strength is brought about by transferring the load from the aluminium matrix to the hybrid reinforcements due to their different elastic constants [26]. The reduction in ductility which has also been reported in [27], [28] was also reported in this investigation as being a result of the reinforcing phases present in the aluminium matrix.…”

Section: Mechanical Properties and Densitysupporting

confidence: 73%

Characterization, machinability studies, and multi-response optimization of AA 6082 hybrid metal matrix composite

Ononiwu

Ozoegwu

Madushele

et al. 2021

Int J Adv Manuf Technol

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This work investigated the effect of carbonized eggshell and fly ash on the microstructure, mechanical properties and machinability of AA 6082. The fabrication method selected for this study was stir casting. For the hybrid metal matrix composite, the weight fraction was 2.5wt% carbonized eggshell and 2.5wt% fly ash. The microstructural examination of the cast composite showed an even dispersal of the reinforcing phases in the aluminium matrix. Density analysis saw a 10.66% reduction of the cast composite in comparison to the aluminium alloy. Improvements of 12.32%, 21.91%, and 8.30% were recorded for the microhardness, tensile strength and compressive strength respectively. The wear studies of the cast samples revealed coefficients of friction (CoF) of 0.499 and 0.290 for the base metal and the AMC respectively. For the machinability studies, the surface roughness and flank tool wear were the responses under consideration. The design of experiments was conducted using the Taguchi method. The input parameters for this investigation was the cutting speeds (100 mm/min, 200 mm/min, 300 mm/min), feeds (0.1 mm/rev, 0.2 mm/rev, 0.3 mm/rev) and depths of cut (0.5 mm, 1.0 mm, 1.5 mm). For the multi-response optimization, Taguchi based grey relational analysis was used. The analysis of variance (ANOVA) of the grey relational grade (GRG) revealed that the feed was the most influential factor on the surface roughness and tool wear. The initial optimization showed the optimal cutting speed, feed and depth of cut as 200 mm/min, 0.2 mm/rev and 1.5 mm respectively. The confirmatory experiments revealed that the optimal combination of factors was 200mm/min, 0.2 mm/rev and 0.5 mm for the cutting speed, feed and depth of cut respectively.

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Section: Mechanical Properties and Densitysupporting

confidence: 73%

Characterization, machinability studies, and multi-response optimization of AA 6082 hybrid metal matrix composite

Ononiwu

Ozoegwu

Madushele

et al. 2021

Int J Adv Manuf Technol

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“…It was observed that negligible amount of weight loss was observed for the prepared composite [35,36]. After reinforcing TiC and GS particles, weight loss of the composite dipped in NaCl solution was reduced.…”

Section: Corrosion Analysismentioning

confidence: 95%

Friction stir additive manufactured AA 6061/TiC/GS composite: assessment of microstructural and mechanical properties

Maurya,

Kumar,

Maurya

2024

Phys. Scr.

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Friction stir additive manufacturing (FSAM) technique was used to fabricate the composite. Present investigation deals with the additive manufacturing of three AA 6061 sheets filled with TiC/GS particles in a groove with the variation reinforcement wt.-%. Micro-structural investigation of the fabricated sample was conducted through optical microscopy, SEM and EDS. Optical and SEM results depict the uniform dispersal of the TiC and GS particles in the processed zone. Due to hard TiC and GS particles embedded in AA 6061, an improvement in hardness by 37.2 % was observed for AA 6061/4wt.-%TiC/6wt.-%GS composite. Tensile and compressive strength was enhanced by 25.8% and 11 % for the developed material. Corrosion test and thermal expansion behavior was investigated for the fabricated composite. 0.2 gm was the weight loss observed for the sample kept in NaCl solution for 72 hours. Negligible amount of thermal expansion was noticed for the prepared material. TiC and GS particles, observed in the fractographic image shows the brittle fracture. EDS analysis confirmed the existence of elements like Al, Mg, Mn etc. in the surface of the specimens. The present experimental results were also compared from the previous published work by the various academicians.

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“…Mechanical properties like ultimate tensile strength and yield strength are also amplified in the composites, when wt.% of the MoS 2 is increased. 12,13 Rahimian et al 14 have described that the compressive strength is augmented with decreased particle size. Narayanasamy and Selvakumar 15 demarcated that compressive strength of a composite is amplified by the increase in the wt.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Al-Mg based composite incorporated with MoS₂ through powder metallurgy

Kumar¹,

Pandian

Rajakarunakaran³

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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In this study, powder metallurgy process has been utilized to produce the composite materials. Pure aluminium (Al) has been selected as the matrix material for the preparation of composite materials. 4% of magnesium (Mg) has been added as the alloying element, whilst molybdenum disulphide (MoS2) is reinforced with a varying wt.% (2, 4 & 6). The intent of this work is, to evaluate some basic mechanical properties (density, microhardness, compression strength and toughness), surface degradation properties (corrosion and wear), and electrical conductivity of the fabricated composite materials. Moreover, SEM mapping and EDAX analysis have been conducted to confirm the presence of reinforcement particles with homogenous distribution in the matrix material and to do the fractographic study of the compressive strength tested samples. The density of the composite material Al-4% Mg-6%MoS2 has been increased compared to the density of pure Al material. Micro Vickers hardness test shows that Al-4% Mg-6%MoS2 composite has 32.86% more hardness as compared to that of pure Al material. Compressive strength of the composite material with the higher wt.% of MoS2 is found to be 181.81 N/mm2, while Al material has only 167.52 N/mm2. The buckling formation during the compression test is avoided in the composite material owing to the existence of MoS2 particulates. The wear loss of composite materials is found low as compared with the unreinforced Al material, owing to the solid lubricant property of MoS2 particles, and hence, coefficient of friction (COF) is also lessened with the increase in the MoS2 wt.%. Also, the MoS2 reinforced materials show good resistance to corrosion due to the presence of molybdenum, which acts as a consistent layer obstacle to prevent the surface from further degradation.

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Microstructure and Mechanical Properties of Al 6061/Al2O3/Fly-Ash Composite Fabricated Through Stir Casting

Cited by 21 publications

References 23 publications

Characterization, machinability studies, and multi-response optimization of AA 6082 hybrid metal matrix composite

Characterization, machinability studies, and multi-response optimization of AA 6082 hybrid metal matrix composite

Friction stir additive manufactured AA 6061/TiC/GS composite: assessment of microstructural and mechanical properties

Investigation of Al-Mg based composite incorporated with MoS₂ through powder metallurgy

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Microstructure and Mechanical Properties of Al 6061/Al2O3/Fly-Ash Composite Fabricated Through Stir Casting

Cited by 21 publications

References 23 publications

Characterization, machinability studies, and multi-response optimization of AA 6082 hybrid metal matrix composite

Characterization, machinability studies, and multi-response optimization of AA 6082 hybrid metal matrix composite

Friction stir additive manufactured AA 6061/TiC/GS composite: assessment of microstructural and mechanical properties

Investigation of Al-Mg based composite incorporated with MoS2 through powder metallurgy

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Investigation of Al-Mg based composite incorporated with MoS₂ through powder metallurgy