Mechanical, Structural and Corrosion behaviour of AlMg4.5/Nano Al2O3 Metal Matrix Composites

Chandrashekar, A.; Ajaykumar, B. S.; Reddappa, H.N.

doi:10.1016/j.matpr.2018.01.069

Cited by 32 publications

(10 citation statements)

References 6 publications

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“…Better the grain estimate better is the hardness and quality of composites prompting to enhance the wear resistance moreover. The improvement in UTS is credited to the nearness of hard nano Al2O3 particulates, which confers quality to the framework amalgam, in this way giving improved rigidity [13]. The expansion of these particles may have offered ascend to huge lingering compressive anxiety created amid cementing because of contrast in coefficient of development between flexible matrix and brittle particles.…”

Section: Ultimate Tensile Strength and Yield Strengthmentioning

confidence: 99%

Investigations on mechanical and wear behavior of nano Al2O3 particulates reinforced AA7475 alloy composites

Nagaral

Auradi²,

Kori³

et al. 2019

JMES

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In the present investigation synthesis, microstructure, mechanical and wear behavior of 5 weight percentage of nano Al2O3 particulate reinforced AA7475 alloy composites has been reported. AA7475 matrix composite containing nano Al2O3 were fabricated by conventional stir casting method. The microstructures of the composites were examined by scanning electron microscopy. Further, mechanical and wear behavior of as cast AA7475 alloy and AA7475 - 5 wt. % nano Al2O3 composites were studied. Mechanical properties like hardness, ultimate, yield strength and percentage elongation were evaluated as per ASTM standards. Pin on disc apparatus was used to conduct the dry sliding wear tests. The experiments were conducted by varying loads and constant sliding speed of 300rpm for sliding distance of 4000m. Microstructural observation revealed the uniform distribution of particles in the AA7475 alloy matrix. From the analysis, it was found that the hardness, ultimate tensile strength and yield strength of composites were increased due to addition of nano Al2O3 particle in the AA7475 alloy matrix. Percentage elongation of the composite decreased in 5 wt. % nano Al2O3 reinforced composites. Further, the volumetric wear loss was found to increase with the load and sliding distance for all materials. Worn surface analysis made by using scanning electron micrographs to know the various mechanisms involved in the wear process.

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Section: Ultimate Tensile Strength and Yield Strengthmentioning

confidence: 99%

Investigations on mechanical and wear behavior of nano Al2O3 particulates reinforced AA7475 alloy composites

Nagaral

Auradi²,

Kori³

et al. 2019

JMES

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show abstract

“…There is still a lot of work to be done in order to optimise their processing. GRMMCs provide up a whole new world of multifunctional and improved properties with a wide variety of applications [18]. Microstructural characterisation, mechanical property assessment, and corrosion experiments on AMMNCs were all successful in this work.…”

Section: Introductionmentioning

confidence: 83%

Mechanical and Morphological Investigation of Aluminium 7075 Reinforced with Nano Graphene / Aluminium Oxide / Inconel Alloy 625 Using Ultrasonic Stir Casting Method

Mahenran¹,

Rajammal²

2022

RCMA

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Aluminium Hybrid Metal Matrix Nano Composites (AHMMNCs) are finding widespread use in the aerospace, marine, defence, and automotive industries due to its high stiffness, high strength-to-weight ratio, and outstanding wear resistance. Hybrid nano composite materials are commonly used in engineering applications due to their proper mechanical organisation. Mechanical property improvement of hybrid nano composites is now a prominent field of research in materials and industrial technology. Aluminium alloy 7075 was reinforced with 0.5, 1.5%, and 2.0 wt. percent of nano-graphene (20-30nm), 2,4,6,8 wt percent of aluminium oxide (50m), and 2,4,6,8 wt percent of Inconel alloy 625 and 1wt percent of magnesium utilising an ultrasonic stir casting process in this study. Mechanical characteristics of the hybrid nano-composite material were evaluated using tension, compression, hardness, and flexural tests. SEM was used for morphology inquiry examination.

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“…The specific explanation for this difference may be that alumina particle behaves like a stress concentrator ii) the solid interfacial strength with reinforcement and matrix is extremely high, leading to greater reinforcement load, thus fracturing at lower strains [27]. Chandrasekhar and co-authors [28] have examined the tensile performance of Al-Al 2 O 3p composite and decline in the ductility is noticed with addition of hard reinforcement.…”

Section: Hardness Measurementsmentioning

confidence: 99%

Fractographic characterization of Al2O3p particulates reinforced Al2014 alloy composites subjected to tensile loading

Bharath¹,

Auradi²,

Nagaral

2021

Frattura Ed Integrità Strutturale

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In the current investigation, efforts are being made to produce an Al2014-Al2O3p composite with variable particle size of 88 mm by liquid stir casting route. 9, 12 and 15 weight proportions of Al2O3p were added to the Al2014 base alloy. By using SEM and EDS testing, microstructural studies have been conducted. Al2014-9, 12 and 15 weight proportion of Al2O3p composites mechanical behavior is determined in line with ASTM standards. Electron microscopic images showed that alumina (Al2O3p) particles are dispersed uniformly within the Al2014 composite matrix. EDS study confirmed the proximity of Al and O elements to composites reinforced by Al2O3p. It is also found that Al2014-Al2O3p composite hardness, UTS, and yield strength are improved by the addition of 9, 12 and 15 weight proportion of Al2O3p. Due to the addition of alumina particles in the Al2014 matrix alloy, the ductility of the produced composites decreases. Tensile fractography is performed using SEM to consider the mechanisms for failure.

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Mechanical, Structural and Corrosion behaviour of AlMg4.5/Nano Al2O3 Metal Matrix Composites

Cited by 32 publications

References 6 publications

Investigations on mechanical and wear behavior of nano Al2O3 particulates reinforced AA7475 alloy composites

Investigations on mechanical and wear behavior of nano Al2O3 particulates reinforced AA7475 alloy composites

Mechanical and Morphological Investigation of Aluminium 7075 Reinforced with Nano Graphene / Aluminium Oxide / Inconel Alloy 625 Using Ultrasonic Stir Casting Method

Fractographic characterization of Al2O3p particulates reinforced Al2014 alloy composites subjected to tensile loading

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