Superplasticity in a 5024 Aluminium Alloy Processed by Severe Plastic Deformation

Abstract:

The superplastic behaviour of an Al-4.6%Mg-0.35%Mn-0.2%Sc-0.09%Zr alloy was studied in the temperature range 250-500°C at strain rates ranging from 10-4 to 10-1 s-1. The AA5024 was subjected to equal channel angular pressing (ECAP) at 300°C up to ~12. The highest elongation-to-failure of ∼3300% was attained at a temperature of 450°C and an initial strain rate of 5.6×10-1 s-1. Regularities of superplastic behaviour of the 5024 aluminium alloy are discussed.

• Periodical: Materials Science Forum (Volume 735)
• Pages: 353-358
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.735.353
• Online since: December 2012
• Authors: Anna Mogucheva, Diana Tagirova, Rustam Kaibyshev
• Keywords: Aluminium Alloy, Equal-Channel Angular Pressing (ECAP), Superplasticity, Ultrafine Grained Structure

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