Characterization of Aluminium Alloy AA2219 Reinforced with Graphite by Stir Casting Method

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Mechanics, Materials Science & Engineering, July 2017 – ISSN 2412-5954

Characterization of Aluminium Alloy AA2219 Reinforced with Graphite by Stir Casting Method1 V. Bhuvaneswari¹, a, G. Yuvaraj¹, b, Dr. A. Saravanakumar¹, c, L. Rajesh Kumar¹, d, R. Kiruthiha¹, e 1 – KPR Institute of Engineering & Technology, Coimbatore, India a – bhuvaneswari.v@kpriet.ac.in b – yuvarajg75@gmail.com c – saravanakumar.a@kpriet.ac.in d – l.rajeshkumar@kpriet.ac.in e – rkiruthu@gmail.com DOI 10.2412/mmse.79.48.932 provided by Seo4U.link

Keywords: aluminium alloy, graphite, mechanical properties, stir casting method.

ABSTRACT. Aluminium alloy has been accepted in the world wide for the fabrication of lightweight structures requiring a high strength to weight ratio, such as aerospace, automotive and structural components resulting in savings of materials and energy. In this work, mechanical properties like porosity test and surface roughness test of Aluminium Alloy AA2219 is reinforced with graphite powder in the ratio of 1%, 3%, 4.5% (in terms of weight) was done. It is fabricated with different composition of graphite using stir casting method and maintained at the temperature of 1023 K, and running speed at 500 rpm. The proposal work is aimed at obtaining a composite material with good surface finish and with less casting effects. By testing, we obtained the increase in surface roughness values of 3.83 µm at 4.5% of graphite and found porosity is increased up to 0.04%.

INTRODUCTION. Nowadays for the light weight applications, aluminium-matrix composites are extensively used in all mechanical fields for pre-existing structure that have to be retrofitted to make them seismic resistant, or to repair damage caused by seismic activity. Aaron Lam et al. [1] did the experimental studies on aluminium alloy 2219 have been formed the creep-aged at 175ºC for 18 h. Using the CAF material constants determined for this alloy, corresponding finite element models have been developed and experimentally validated using the measured profiles. Suresh et al., [2] investigate the Aluminium composites have been produced with copper-coated cenospheres of fly ash as reinforcement. The results indicate that with increasing percentage of reinforcement, the tensile strength, impact strength and wear resistance of composites increases up-to 10%. Dunia Abdul Saheb [3] study the modest attempt has been made to develop aluminium based silicon carbide particulate MMCs. An increasing of hardness and with increase in weight percentage of ceramic materials has been observed. The best results (maximum hardness) have been obtained at 25 % weight fraction of SiC and at 4% weight fraction of graphite. Rajasekaran, & Sampath [4] Aluminium alloy AA2219 was reinforced with TiB particles introduced in-situ by the salt- metal reaction technique and the results proved that the addition of TiB particles results in increased mechanical properties, such as 0.2%YS, UTS and hardness. Chunlin He et al.,[5] Analysed the corrosion protection from sulphuric acid anodized coatings on 2024 aluminium and SiC particle reinforced 2024 aluminium metal matrix composite (SiCp/2024Al MMC) The results show that the anodized coating on 2024Al provides good corrosion protection to 3.5 wt. % NaCl. Krupinski et al., [6] investigated AlSi7Cu3Mg aluminium cast alloy was performed for samples cooled with different cooling rate settings. Results observed that phase morphology changes increase in relation to the cooling rate for the Al-Si-Cu alloy. The 1

© 2017 The Authors. Published by Magnolithe GmbH. This is an open access article under the CC BY-NC-ND license http://creativecommons.org/licenses/by-nc-nd/4.0/

MMSE Journal. Open Access www.mmse.xyz


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