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An examination of the superplastic characteristics of Al–Mg–Sc alloys after processing

Published online by Cambridge University Press:  25 July 2017

Pedro H.R. Pereira ,
Yi Huang ,
Megumi Kawasaki  and
Terence G. Langdon
Pedro H.R. Pereira
Affiliation:
Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, U.K.
Yi Huang
Affiliation:
Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, U.K.
Megumi Kawasaki
Affiliation:
School of Mechanical, Industrial & Manufacturing Engineering, Oregon State University, Corvallis, Oregon 97331-6001, USA
Terence G. Langdon*
Affiliation:
Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, U.K.; and Departments of Aerospace & Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-1453, USA
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

The Al–Mg–Sc alloys have become important materials in research conducted on superplasticity in aluminum-based alloys. Many results are now available and this provides an opportunity to examine the consistency of these data and also to make a direct comparison with the predicted rate of flow in conventional superplasticity. Accordingly, all available data were tabulated with divisions according to whether the samples were prepared without processing using severe plastic deformation (SPD) techniques or they were processed using the SPD procedures of equal-channel angular pressing or high-pressure torsion or they were obtained from friction stir processing. It is shown that all results are mutually consistent, the measured superplastic strain rates have no clear dependence on the precise chemical compositions of the alloys, and there is a general agreement, to within less than one order of magnitude of strain rate, with the theoretical prediction for superplastic flow in conventional materials.

Keywords

Al–Mg–Sc alloysequal-channel angular pressingfriction stir processinghigh-pressure torsionsuperplasticity
Type
Review
Information
Journal of Materials Research , Volume 32 , Issue 24: Focus Issue: Mechanical Properties and Microstructure of Advanced Metallic Alloys—in Honor of Prof. Haël Mughrabi PART B , 28 December 2017 , pp. 4541 - 4553
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Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Lei Lu

This section of Journal of Materials Research is reserved for papers that are reviews of literature in a given area.

References

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