Corrosion Studies of As Casted and Heat Treated Aluminium-7075 Composites

Sravanthi, M.; Manjunatha, K.

doi:10.1016/j.matpr.2018.06.632

Cited by 10 publications

(8 citation statements)

References 17 publications

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“…The appearance of a peak at 3,359 cm -1 and a shift to 3,361 cm -1 indicate that the phenolic or amine groups of the leaves extract may be involved in the formation of Fe NPs. It can be concluded from the spectra that the polyphenols in the leaves extract were responsible for the reduction and stabilization of Fe NPs, which also agrees with the UV-visible analysis [7] .…”

Section: Ftir Analysissupporting

confidence: 84%

“…Using Scherrer's formula, which is provided below, and the peak broadening profile of the peak at all 2 values, the average crystallite size was estimated using the FWHM value of the most intense peak. d = 0.94λ βcosθ where λ is the wavelength (1.5418 Å) and β is the full width at half maximum (FWHM) of the corresponding peak [7] . The average crystallite size of synthesized BGL-Fe NPs calculated from Sherrer's equation was 47.66 nm for BGL-Fe NPs, 10.55 nm for BGL-Fe NPs-4, 11.33 nm for BGL-Fe NPs-5, 15.72 nm for BGL-Fe NPs-6, respectively.…”

Section: Xrd Analysismentioning

confidence: 99%

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Green synthesis and characterization of iron nanoparticle using extracted bitter guard leaves used as methylene blue removal

Lin,

Khaing,

Htwe

et al. 2023

Charact. Appl. Nanomater.

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Zero-valent iron is a moderately reducing reagent that is both non-toxic and affordable. In the present work, iron nanoparticles were synthesized using bitter guard leaf extract (Momordica charantia L.) (BGL-Fe NP). Using leaf samples from bitter protectant extract, iron nanoparticles were synthesized with secondary metabolites such as flavonoids and polyphenols acting as capping and reducing agents. Polyphenols reduce Fe2+/Fe3+ to nanovalent iron or iron nanoparticles. Iron nanoparticles were synthesized by reducing iron chloride as a precursor with bitter protective leaf extract in an alkaline environment. The obtained BGL-Fe NPs were calcined for 4 h at various temperatures of 400 °C, 500 °C, and 600 °C. The obtained samples were coded as BGL-Fe NPs-4, BGL-Fe NPs-5, and BGL-Fe NPs-6, respectively. The synthesized BGL-Fe NPs were systematically characterized by XRD, SEM, FTIR, UV-Vis and TG-DTA analysis. The obtained BGL-Fe NPs were then used as an adsorbent to remove the aqueous solution of basic methylene blue (MB) dye. MB concentration was monitored using UV-Vis spectroscopy.

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Section: Ftir Analysissupporting

confidence: 84%

Section: Xrd Analysismentioning

confidence: 99%

Green synthesis and characterization of iron nanoparticle using extracted bitter guard leaves used as methylene blue removal

Lin,

Khaing,

Htwe

et al. 2023

Charact. Appl. Nanomater.

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“…The decrease in the corrosion resistance of the Al-MMCs due to the presence of reinforcement materials has been previously reported by other researchers [16,18,19]. Formation of metallic oxides on the surface is said to be responsible for the reduction in corrosion rate of the heat treated composite, as earlier explained.…”

Section: Corrosion Analysessupporting

confidence: 69%

Tribological Behaviour of Aluminium-Copper-Cullet Metal Composite

Hussain Nuhu,

Jikan,

Asman

et al. 2023

Preprint

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An Aluminium composite metal, Al-Cu-CP was fabricated from recycled raw materials. The composite was fabricated by means of stir casting method due to its simplicity and economic worth. The composite and the unreinforced Al were both analysed for chemical and mechanical properties. The Al-Cu-CP metal composite produced has shown appreciable level of wear resistance and corrosion resistance in artificial seawater (3.5 g/L NaCl) and allowed to stand for 96 h at room temperature. Different loads were considered for the wear resistance tests, 5 N, 10 N, 15 N and 20 N while 150 rpm, 250 rpm, 350 rpm and 450 rpm were the speeds selected for the adhesive wear resistance test. Improved properties were observed after heat treatment of the Al-Cu-CP metal composite. The heat treated composite was more resistant to corrosion than the untreated composite and it has been confirmed that the corrosion resistance of the materials under study has direct relationship with the immersion period. When the maximum load was applied to the three (3) sets of the samples (unreinforced, treated and treated composites), severe degrees of wear manifested on their various surfaces. Optical images from morphological analysis revealed that wear severity was highest on the surface of the unreinforced matrix, followed by the untreated metal composite and the heat-treated composite was found to be the least affected. Due to these enhanced properties of the Al-Cu-CP metal composite, it could be recommended where high strength with light density product is required such as automobile brake shoes and brake disc as a result of its upgraded mechanical properties.

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“…On the other hand, 7000 aluminum alloy series have lower corrosion resistance compared to pure aluminum. Its main alloying element is Zn (~6%), which makes the appearance of the alumina protective layer (with higher corrosion resistance) more difficult [31]. For the 2000 and 7000 series, corrosion is usually localized, with the appearance of pitting common, as well as intergranular corrosion, which can be considered as the generation and nucleation points of microcracks that affect the continuity of the surface microstructure [32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Cutting Speed and Feed Influence on Surface Microhardness of Dry-Turned UNS A97075-T6 Alloy

et al. 2020

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In this work, an analysis of the cutting speed and feed influence on surface roughness and microhardness of UNS A97075-T6 alloy, turned under dry conditions, was carried out. The results were compared before and after a corrosion process. The influence of these cutting parameters on each of these variables was analyzed, as well as the possible interrelation between them. The microgeometrical deviations showed a general trend to increase with feed. However, no significant modifications were observed as a function of the cutting speed. This trend was softer after the corrosion process, due to the surface alterations produced by pitting corrosion, which resulted in higher dispersion of the experimental data. In addition, a surface microhardness increment was observed in all samples, after machining and before corrosion, regardless of the cutting parameter values. The experimental results revealed that the mechanical effects, produced by the feed, should not be neglected against the thermal effects, produced by the cutting speed, within the range of the tested cutting speed. Finally, the corrosion process negatively affected the microhardness, but it was not possible to establish a direct relationship between the cutting parameters, surface roughness, and microhardness after a corrosion process.

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Corrosion Studies of As Casted and Heat Treated Aluminium-7075 Composites

Cited by 10 publications

References 17 publications

Green synthesis and characterization of iron nanoparticle using extracted bitter guard leaves used as methylene blue removal

Green synthesis and characterization of iron nanoparticle using extracted bitter guard leaves used as methylene blue removal

Tribological Behaviour of Aluminium-Copper-Cullet Metal Composite

Cutting Speed and Feed Influence on Surface Microhardness of Dry-Turned UNS A97075-T6 Alloy

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