Microstructural evolution in pure aluminium and a 7034 alloy processed by equal channel angular pressing


Gao, N., Starink, M.J., Xu, C. and Langdon, T.G., (2004) Microstructural evolution in pure aluminium and a 7034 alloy processed by equal channel angular pressing Nie, J.F., Morton, A.J. and Muddle, B.C. (eds.) In Proceedings of 9th International Conference on Aluminium Alloys. Institute of Materials Engineering Australasia., pp. 856-861.

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Description/Abstract

Experiments were conducted to evaluate the microstructural evolution occurring in pure aluminium and a spray-cast Al-7034 alloy after processing through equal-channel angular pressing (ECAP). Electron back-scatter diffraction (EBSD) was used to determine the grain boundary misorientations and the texture after ECAP and differential scanning calorimetry (DSC) was employed to evaluate the nature of thermal effects taking place during heating. The results demonstrate there is an increase in the fraction of boundaries having high angles of misorientation with increasing strain. For pure aluminium, there is an S texture {122} <634> after 4 passes and a brass texture {011} <211> after 8 passes. For the Al-7034 alloy, the textures changes from a fibre <111>x texture in the as-received condition to a <101>y after 1 pass, <111>y after 4 passes and <100>z after 8 passes. For the Al-7034 alloy, the DSC analysis identifies the occurrence of several thermal effects during heating involving the formation, coarsening, dissolution and melting of the ?-phase.

Item Type: Conference or Workshop Item (Paper)
Venue - Dates: 9th International Conference on Aluminium Alloys (ICAA9), 2004-08-02 - 2004-08-05
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ePrint ID: 22733
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2004Published
Date Deposited: 09 Mar 2007
Last Modified: 16 Apr 2017 22:49
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/22733

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