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Bhubaneshwar, India

Ajeet Babu P.K.,VIT ARAI Academy | Saraf M.R.,The Automotive Research Association of India | Vora K.C.,The Automotive Research Association of India | Chaurasiya S.M.,The Automotive Research Association of India | Kuppan P.,Vellore Institute of Technology
Materials Today: Proceedings | Year: 2015

The contemporary challenge in automotive industry is weight reduction for better fuel economy and low greenhouse gases. Compared to conventional automotive materials, aluminium alloy has enhanced strength-to-mass ratio and low density, which confers to optimal requirement for automotive applications. Besides casting, Aluminium alloy forging is emerging as a new area, where deep research is required for evaluation of the forgeability with respect to forging parameters such as forging equipment, heating temperature, deformation temperature and post forging treatments. In this paper Al 6061 T6 alloy was thus selected and forgeability is evaluated for various manufacturing conditions. To understand the material behavior the forging process is physically simulated by thermo mechanical experiments. The experiments were carried out using Gleeble simulator at three different temperature (350°C, 400°C & 450°C) and at three different strain rates (0.2s-1, 2 s-1, 20 s-1). The three strain rate is selected to represent the forging equipment which works on force, stroke and energy dependent principles. Material characterization activity was carried out for the sample and the entire experiments were simulated using FORGE software to correlate the results. The forgeability of the material is observed good at all the strain rates for 2/3rdreduction ratio and significant difference is observed in the mechanical behavior for three different temperatures. © 2015 Elsevier Ltd. Source

Ajeet Babu P.K.,VIT ARAI Academy | Nilawar A.S.,VIT ARAI Academy | Vishvakarma P.,VIT ARAI Academy | Biswas S.,Indian Institute of Science | And 2 more authors.
SAE International Journal of Materials and Manufacturing | Year: 2012

The contemporary challenge in automotive industry is weightreduction. Compared to conventional automotive materials,commercially pure magnesium is having enhanced strength-to-massratio and low density, which confers to optimal requirement forautomotive applications. Amongst various other reasons such as lowhardness, low corrosion resistance also prevents it from enteringmass production. Severe plastic deformation by equal channelangular extrusion (ECAE) is regarded as one of the prominentmethods to increase the mechanical properties of magnesium.However, the investigation in corrosion resistance of extrudedmagnesium in automotive environment is not discussed in depth. Thispaper discusses the microstructure and corrosion characteristics ofcommercially pure magnesium which has been extruded by ECAE at 473k through the routes a and bc up to eight passes andtheir three surfaces (extrusion direction, normal direction &transverse direction) in detail. The corrosion experiment has beenperformed using conventional electrochemical techniques such asopen-circuit potential measurements and potentiodynamicpolarization method in 3.5 wt% NaCl solution environment. Thesurface morphology of the magnesium billet was examined in detailusing scanning electron microscopy (SEM) and the hardness wasmeasured using micro Vickers hardness tester. © 2012, SAE International. All rights reserved. Source

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