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

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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.

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Periodical:

Solid State Phenomena (Volume 176)

Pages:

21-28

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.176.21

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Online since:

June 2011

Authors:

Kinga Rodak, Krzysztof Radwański, Rafal M. Molak

Keywords:

Aluminum (Al), EBSD, Microstructure, Property Analysis, Severe Plastic Deformation (SPD), STEM

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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