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Effect of recrystallisation on Al3Zr dispersoid behaviour in thick plates of aluminium alloy AA7150

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Abstract

The ageing responses of surface/centre layer materials from a commercially produced AA7150 thick plate have been studied after both water quenching (WQ) and air cooling (AC). The results show that the higher degree of recrystallisation near the plate surface decreases its age hardening response in AC condition. Quench-induced phases have been found to precipitate preferentially on Al3Zr dispersoids in recrystallised grains. Microstructural observations show that Al3Zr dispersoids in recrystallised grains exhibit the same crystal structure and orientation as those in adjacent subgrains.

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Acknowledgements

The authors thank the Aluminium Corporation of China Ltd (Chalco) for supporting this work financially and providing materials as part of the Australia-China International Centre for Light Alloy Research (ICLAR). The ARC Centre of Excellence for Design in Light Metals and the Monash Centre for Electron Microscopy (MCEM) are also acknowledged.

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Authors and Affiliations

  1. ARC Centre of Excellence for Design in Light Metals, Department of Materials Engineering, Monash University, Melbourne, VIC, 3800, Australia

    Yong Zhang, Colleen Bettles & Paul A. Rometsch

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  1. Yong Zhang
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  2. Colleen Bettles
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  3. Paul A. Rometsch
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Correspondence to Yong Zhang.

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Zhang, Y., Bettles, C. & Rometsch, P.A. Effect of recrystallisation on Al3Zr dispersoid behaviour in thick plates of aluminium alloy AA7150. J Mater Sci 49, 1709–1715 (2014). https://doi.org/10.1007/s10853-013-7856-x

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  • DOI: https://doi.org/10.1007/s10853-013-7856-x

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