Investigations on tensile fractography and wear characteristics of Al7075-Al2O3-SiC Hybrid Metal Matrix Composites routed through liquid metallurgical techniques

Ravikumar, M.; Suresh, R.; Reddappa, H.N.; Mohan, Y.; Nagaraja, C. R.; Babu, E R

doi:10.3221/igf-esis.56.13

Cited by 13 publications

(13 citation statements)

References 22 publications

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“…9(d)), suggesting threshold limit for nano-particulate reinforcement percentage. The existence of threshold limit for the reinforcement percentage is also reported for Si 3 Ni 4 reinforced Al MMCs [32][33][34][35]. Thus improved mechanical properties of MMCs at higher percentage was marginal compared to successive lower percentage of incorporation of particulate.…”

Section: Fractography Analysismentioning

confidence: 76%

Investigation on Microstructure and Tensile Fractography of RE Oxides (CeO2/Y2O3) Reinforced AZ91D Magnesium Matrix Composites

Gotagunaki¹,

Mudakappanavar²,

Suresh

2022

Frattura Ed Integrità Strutturale

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The current work aims to investigate the mechanical properties of rare oxide reinforced Mg alloy based MMCs. Magnesium matrix considered in the study is AZ91D alloy, whereas rare earth oxides reinforced were CeO2 and Y2O3. The Y2O3 particulate reinforcement percentage was varied from 1 to 3% in the steps of 1% to study its influence on mechanical properties of MMCs. Stir casting route was adopted to fabricate sample for study. Microstructure analysis illustrated the uniform distribution of particulate in matrix alloys. The obtained results revealed the enhanced mechanical properties such as tensile strength, yield strength, elongation and hardness of MMCs due to increased percentage of reinforcement. Fractography analysis of fracture surfaces demonstrated the microcracks and cleavage were dominant in pure alloy. While particle debonding, extensive plastics deformation were prominent in-addition to microcracks in MMCs.

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Section: Fractography Analysismentioning

confidence: 76%

Investigation on Microstructure and Tensile Fractography of RE Oxides (CeO2/Y2O3) Reinforced AZ91D Magnesium Matrix Composites

Gotagunaki¹,

Mudakappanavar²,

Suresh

2022

Frattura Ed Integrità Strutturale

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“…Results reveal that, after hot rolling, most of the reinforcement particulates have been aligned within the direction of metal flow [29,30]. When compared to the Al6061 alloy, the hybrid MMCs show smaller sized grains due to presence of hard particles generally, which contributes to better grain refinement [31,32]. The presence of TiB 2 , a grain refiner, plays a vital role in grain refining of hybrid MMCs.…”

Section: Micro-structural Analysismentioning

confidence: 99%

“…6 (a), fractured surface reveals the existence of dimples showing ductile nature of fracture. But, the size of micro voids formed after the fracture show debonding of Al grains, which are placed adjacent to micro-porosities and agglomeration of hard particulates [32]. The existence of hard particulates such as TiB 2 and CeO 2 on the fractured surface shows better bonding with the base alloy due to the clean interface.…”

Section: Tensile Strengthmentioning

confidence: 99%

Mechanical, Wear, and Fracture Behavior of Titanium Diboride (TiB2) - Cerium Oxide (CeO2) Reinforced Al-6061 Hot-rolled Hybrid Composites

Iyengar

Sethuramu

Ravikumar

2022

Frattura Ed Integrità Strutturale

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Development of aluminium composites by stircasting technique is an effective method for fabrication of better quality of MMCs. Stircasting technique is one of the most commonly accepted techniques. In this research work, Al6061 / TiB2+CeO2 hybrid MMCs have been fabricated with varying wt. % of TiB2 (2.5%, 5%, 7.5% and 10%) particulates and constant 5% of CeO2 particulates. The monolithic alloy and hybrid composite were hot-rolled at a temperature of 515°C. Whereas, both the monolithic and hot-rolled hybrid composite was subjected to micro-structural study, hardness and tensile test. Optical microscope analysis revealed uniform dispersal of hard particles with in the base matrix in case of both of ascast and hot-rolled composites. Both ascast and hotrolled hybrid composites have shown extensive enhanced mechanical behavior and high wear resistance when compared with monolithic alloy. Though, ductility of the hybrid MMCs decreased with increasing TiB2 and CeO2 content. A tensile and wear fractography outcome shows the internal fractured structure of a tensile and wear specimen which was analysed using a SEM analysis.

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“…According to the data, increasing the proportion of hard ceramic particles improves the wear resistance of the material. According to SEM data and the oxide layer formed during wear tests, abrasion wear is the most common mechanism of wear [12]. The wear of Al composites reinforced with Al6061 red mud was studied.…”

Section: Introductionmentioning

confidence: 99%

Wear characterization of Al 7075 alloy hybrid composites

S¹,

M²,

Kumaraswamy³

2022

Metall Mater Eng

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Aluminium alloy hybrid composites are in high demand for advanced scientific applications due to their high strength, low weight, and enhanced tribological properties. A hybrid composite of aluminium alloy (Al7075) and aluminium oxide (Al2O3) and E-glass shot fibres was produced using a sand moulding technique in an electric resistance furnace. The objective of this research was to look at the wear characteristics of Al7075-Al2O3-E-glass hybrid composites with various Al2O3 (3-12%) and E-glass weight percentages (2-6 percent). The sliding distance (500, 1000, and 1500 m), load (10, 20, and 30N), Al2O3 (3, 6, and 9 %), and E-glass (2-6 %) are the wear characteristics that are considered. Wear testing is carried out using pin-on-disc equipment (WTE 165 model, Version-EV00) in line with the Taguchi L9 orthogonal array. Taguchi analysis was done on the collected data to find SN plots. Regression analysis was done along with ANOVA to find relationships between different factors selected. In order to reduce the wear rate of hybrid composites, the optimal wear parameters are determined. As the percentage of reinforcements increased, the rate of deterioration decreased. SEM scans revealed the attachment and displacement of unintended wear debris, as well as the uniform distribution of Al2O3/E-glass particles.

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Investigations on tensile fractography and wear characteristics of Al7075-Al2O3-SiC Hybrid Metal Matrix Composites routed through liquid metallurgical techniques

Cited by 13 publications

References 22 publications

Investigation on Microstructure and Tensile Fractography of RE Oxides (CeO2/Y2O3) Reinforced AZ91D Magnesium Matrix Composites

Investigation on Microstructure and Tensile Fractography of RE Oxides (CeO2/Y2O3) Reinforced AZ91D Magnesium Matrix Composites

Mechanical, Wear, and Fracture Behavior of Titanium Diboride (TiB2) - Cerium Oxide (CeO2) Reinforced Al-6061 Hot-rolled Hybrid Composites

Wear characterization of Al 7075 alloy hybrid composites

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