Preprint Article Version 1 This version is not peer-reviewed

Design Optimization of Angular Extrusion for Severe Plastic Deformation of Tubular Specimens

Version 1 : Received: 10 June 2017 / Approved: 12 June 2017 / Online: 12 June 2017 (06:10:57 CEST)

How to cite: Mwema, M.F.; Matthew, K.; Harisson, S.; Japheth, O. Design Optimization of Angular Extrusion for Severe Plastic Deformation of Tubular Specimens. Preprints 2017, 2017060049 (doi: 10.20944/preprints201706.0049.v1). Mwema, M.F.; Matthew, K.; Harisson, S.; Japheth, O. Design Optimization of Angular Extrusion for Severe Plastic Deformation of Tubular Specimens. Preprints 2017, 2017060049 (doi: 10.20944/preprints201706.0049.v1).

Abstract

The purpose of this work is to optimize angular extrusion for sever plastic deformation of tubular specimens. A finite element model (FEM) was built in Deform-3D® for three extrusion dies and analyzed. The dies were ECAP (135°), TCAP with external groove of 90° (denoted as TCAP-e) and TCAP with internal groove of 90° (denoted as TCAP-i). The analysis for process parameters (such as coefficient of friction-μ, die angles-ѱ and φ, temperature - T, and radius ratio-R) showed that TCAP-i was the optimal die in processing Al6063 tubes based on strain and load distribution of the model. The TCAP-i die model was further optimized for different parameters namely die angles, coefficient of friction, deformation ratio and temperature. The results showed that at constant process temperature of 25 °C, the optimal TCAP-i has the following parameters: φ2=800, Ѱ1=300, Ѱ2=800, Ѱ3=300, μ =0.4 and R =1.5.

Subject Areas

ECAP; Tubular channel angular pressing (TCAP); finite element; severe plastic deformation; strains

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