Evaluation of Vegetable Based Lubricants on Hardness Property of ECAE Aluminum

Temitayo, M Azeez and Oladeji, John T and Mudashiru, Lateef O and Uchegbu, Ikenna D (2017) Evaluation of Vegetable Based Lubricants on Hardness Property of ECAE Aluminum. European Journal of Advances in Engineering and Technology, 4 (8). ISSN 2394 - 658X

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Abstract

Equal Channel Angular Extrusion (ECAE) is the extrusion method that involve s the use of angular die to introduce plastic deformation on any metal espec ially aluminum which in turn improves its hardness. Lubricant’s role cannot be under estimated in the process as it requires reducing the high heat of deformation and extrusion pressure in- volved. The commonly used lubrican ts for this process were from orga nic sources, very scarce and non - environmentally friendly. Hence , it is a great advantage to in vestigate alternative extrusion lubricant from vegetable source. Four vegetable based lubricants such as jatropha oil, castor oil, neem oil and cottonseed oil were selected for this research . The properties of these selected oils were characterized to its physical and chemical properties. Aluminum rod was machined to 17 billets of size 11.95m x 11.95m x 40m (l × b × h) each and was annealed. The billet size was selected based on the configurations of the fabricated ECAE die. Four billets were extruded with each lubricant which makes the tot al of 16billets extruded for the four lubricants and the last billet was used as the con- trol. The hardness of the extruded sa mples was evaluated after the extrusion and compared to the control. The hardness result was compared to the sample extrude d with organic based lubricants from the literature It was di s- covered that all the lubricants tested greatly enhanced hardne ss of the extruded sample but at different magnitude. Jatropha oil exhibit s the greatest hardness on extrusion of Aluminum

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