Abstract
The effect of severe plastic deformation on intermetallic particles was investigated using high-pressure torsion on an Al–1Mg–0.2Si–0.2Fe–0.3Mn alloy and an Al–3Mg–0.2Si–0.2Fe–0.3Mn (wt%) alloy. Extensive optical microscopy and scanning electron microscopy was performed to analyse the intermetallic particles using image analysis software. It was found that all the intermetallic particles decreased in size with increasing strain whilst their spatial distribution was homogenised. A greater decrease in size was found for the intermetallic particles present in Al–1Mg alloy and the possible causes are discussed. Even though the strain near the centre of the sample is close to zero, refinement of intermetallic particles is substantial at this location.
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Acknowledgements
XGQ gratefully acknowledges the funding support received from the Engineering and Physical Sciences Research Council (EPSRC) PhD plus Grant No. EP/P503841/1. The authors thank Dr Zhihua Zhu and Dr G. Mahon for the rolling of the alloys, and in addition, Dr Zhihua Zhu for performing additional SEM analysis (for Fig. 1). The authors also thank Mr William Vousden for microhardness testing, and Dr Nong Gao for discussion regarding HPT.
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Crump, J., Qiao, X.G. & Starink, M.J. The effect of high-pressure torsion on the behaviour of intermetallic particles present in Al–1Mg and Al–3Mg. J Mater Sci 47, 1751–1757 (2012). https://doi.org/10.1007/s10853-011-5955-0
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DOI: https://doi.org/10.1007/s10853-011-5955-0