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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.

Record type: Conference or Workshop Item (Paper)


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.

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Published date: 2004
Venue - Dates: 9th International Conference on Aluminium Alloys (ICAA9), 2004-08-02 - 2004-08-05


Local EPrints ID: 22733
PURE UUID: 0cb10c67-6efb-454a-9a88-818018ee2e31
ORCID for T.G. Langdon: ORCID iD

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Date deposited: 09 Mar 2007
Last modified: 17 Jul 2017 16:20

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Author: N. Gao
Author: M.J. Starink
Author: C. Xu
Author: T.G. Langdon ORCID iD
Editor: J.F. Nie
Editor: A.J. Morton
Editor: B.C. Muddle

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