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Achieving superplasticity in fine-grainedAl-Mg-Sc alloys.

Pereira, P.H.R., Huang, Y., Kawasaki, M. and Langdon, T.G., 2021. Achieving superplasticity in fine-grainedAl-Mg-Sc alloys. In: THERMEC 2021: 11th International Conference on Processing & Manufacturing of Advanced Materials, 1-5 June 2021, Vienna, Austria.

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Abstract

Superplasticity denotes the ability of a limited number of materials to achieve exceptionally high tensile elongations of at least 400%. Experiments show that the Al-Mg-Sc alloys provide excellent capabilities for achieving superplastic flow and also they can be formed easily in biaxial superplastic forming operations. It is important, therefore, to examine the superplastic flow mechanism when the alloy is prepared using different procedures. This report examines the superplastic characteristics of these alloys after preparation without subjecting to any severe plastic deformation (SPD), after processing using the two SPD procedures of equal-channel angular pressing (ECAP) and high-pressure torsion (HPT) and after processing using the alternative procedure of friction stir processing (FSP). The results are compared using each technique and they are examined with reference to a theoretical model that was developed specifically for superplastic flow in conventional alloys.

Item Type:Conference or Workshop Item (Lecture)
Group:Faculty of Science & Technology
ID Code:36418
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:04 Jan 2022 16:05
Last Modified:04 Jan 2022 16:08

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