Paper Title:

Microstructure and Mechanical Properties of Aluminum Processed by Multi-Axial Compression

Periodical Solid State Phenomena (Volume 176)
Main Theme Light Metals and their Alloys I - Technology, Microstructure and Properties
Edited by Agnieszka Botor-Probierz and Andrzej Kiełbus
Pages 21-28
DOI 10.4028/www.scientific.net/SSP.176.21
Citation Kinga Rodak et al., 2011, Solid State Phenomena, 176, 21
Online since June, 2011
Authors Kinga Rodak, Krzysztof Radwański, Rafal M. Molak
Keywords Aluminum, EBSD, Microstructure, Property Analysis, Severe Plastic Deformation (SPD), STEM
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Abstract

. In this study, commercial Al was subjected to plastic deformation by multi-axial compression. The microstructure and mechanical properties in dependence on effective strain were studied. Aluminum was processed to effective strain f = 9.6. The misorientation distribution and subgrain/grain size were analyzed by using a scanning electron microscopy (SEM) equipment with electron back scattered diffraction (EBSD) facility. The dislocation microstructure was investigated by a scanning transmission electron microscope (STEM). The mechanical properties as: yield strength (YS), ultimate tensile strength (UTS), uniform and total elongation were performed on MTS QTest/10 machine equipped with digital image correlation method (DIC). Deformation of Al by the multi-axial compression leads to grain refinement to ultra-fine grains (UFGs) and improvement in strength properties. Material exhibits the following strength parameters: UTS: 129 MPa, YS: 124 MPa after deformation at f = 9.6. These values are about two times higher compared with initial state.