ELK ASIA PACIFIC JOURNAL OF MECHANICAL ENGINEERING RRESEARCH ISSN 2394-9368 (Online); EAPJMER/issn. 2394-9368/2016; Volume 3 Issue 1 (2017) www.elkjournals.com ……………………………………………………………………………………………… FINITE ELEMENT ANALYSIS OF C-SHAPED EQUAL CHANNEL RECIPROCATING EXTRUSION PROCESS OF MAGNEZIUM ZK60 ALLOY Ekhebume Joseph Ogbezode Masters Student, Department of Mechanical Engineering, Faculty of Technology, University of Ibadan, Ibadan, Nigeria. Professor, Department of Mechanical Engineering, Faculty of Engineering, University of Lagos, Akoka, Lagos, Nigeria.ogbezode.joseph@gmail.com Sehinde Joseph Ajiboye Professor, Department of Mechanical Engineering, Faculty of Engineering, University of Lagos, Akoka, Lagos, Nigeria. ABSTRACT The Brittle nature of magnesium and its alloys have become a research concern in aerospace and automobile industries. Alloying magnesium with other metals via severe plastic deformation (SPD) methods could enhance its mechanical properties. In this work, C-Shaped Equal Channel Reciprocating Extrusion (CECRE) process was employed via finite element methods (Deform-3D TM ). The results revealed reasonable changes in the mechanical and microstructural properties of the alloy after simulated at different lubrication conditions. Also, improved maximum effective strain values were realized at different friction conditions for a single pass of extrusion process. Thus, minimum deformation inhomogeneity index (C) values, also, achieved at moderate friction condition for different ram speeds. Effects of strain-hardening on the mechanical properties at constant strain-rate sensitivity value of 0.05 were also investigated at different friction conditions. The finite element analysis of numerically simulated CECRE processed Magnesium ZK60 alloy have shown favourable improvement in its mechanical properties with uniform strain distribution for better optimum performance. Therefore, CECRE still offers the potentials of imposing shear strains on metallic alloys without change in their cross-sections. Key-words: C-shaped equal channel reciprocating extrusion (CECRE), Deformation inhomogeneity index(C), Severe plastic deformation (SPD), Strain-hardening, Strain-rate sensitivity 1. INTRODUCTION 1.1 Background of study Magnesium alloys have attracted considerable interest from the automobile and aerospace industries because of their high specific strength and excellent machinability. Due to fracture and component failure as a result of relatively low density and brittleness of Magnesium alloys, the hexagonal close packed (HCP) structure and limited slip systems are major difficulties that hinder their widespread applications. Recently, it was also discovered that the brittle nature of