Investigation of Tensile Property and Pore Closure Behavior and the Influence of Processing Route during Equal Channel Angular Pressing of Pure Aluminum Powder Compacts

Abstract:

This paper revolves around the idea of finding the strength enhancement of pure ‘Al’ compacts processed through Equal-Channel Angular Pressing (ECAP) process which ultimately results in fine grain structure of the material processed. The material initially prepared through conventional powder metallurgical route is processed in an ECAP die with a channel angle of 110⁰. The tensile test and micro-structural evaluation is done following the ECAP process and it is found that there was a substantial enhancement in the tensile properties and Ultrafine Grain (UFG) structure is obtained due to the Severe Plastic Deformation (SPD) phenomenon taking place during the process. The pore closure behavior is also analyzed using the TEM micrographs after each pass in ECAP die and promising results are obtained when the material is processed through different routes. The dislocation cell structure is also found to get refined after each pass through the die. The pore closure behavior is also confirmed using the DEFORM 3D software when the aluminum is simulated under similar conditions.

• Periodical: Applied Mechanics and Materials (Volumes 592-594)
• Pages: 444-450
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.592-594.444
• Online since: July 2014
• Authors: R. Venkatraman, S. Raghuraman, R. Balaji*, Kumar K.S. Ajay, M. Viswanath
• Keywords: Pore Closure, Severe Plastic Deformation, Ultrafine Grain Structure

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