Simulation of deformation behaviour of Aluminium 7075 during Equal Channel Angular Pressing (ECAP)

Harrison Shagwira, Japheth Obiko, Fredrick Mwema*, Tien-Chien Jen

*Corresponding author for this work

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Abstract

This paper presents a finite element simulation of equal channel angular pressing (ECAP) since it is one of the most common and successful severe plastic deformation techniques. This study reports the influence of the most significant factors influencing the ECAP technique. Through finite element simulation, the effect of the die geometry, workpiece geometry, and the pressing speed on the effective strain distributions, damage, and pressing loads, were investigated. The influence of the ECAP method on different material models is also presented. Additionally, the prospective expansion and future applications of ECAP are herein highlighted. From the results, the die geometry of a 90° channel imparts the highest strains during ECAP. Additionally, specimens of rectangular geometry are susceptible to cracking and damage as compared to circular samples. It was found that very high processing speeds (>7mm/sec) are undesirable during ECAP since they cause very high internal stresses to the structure of the workpieces. Besides, processing at room temperature can achieve homogeneous strain distribution with minimum sample damage.
Original languageEnglish
Article number01002
Number of pages15
JournalMATEC Web of Conferences
Volume374
Early online date5 Jan 2023
DOIs
Publication statusPublished - 2023
Externally publishedYes
EventInternational Conference on Applied Research and Engineering (ICARAE2022) - Cape Peninsula University of Technology, Cape Town, South Africa
Duration: 18 Nov 202220 Nov 2022
https://icarae2022.weebly.com/

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