Strain distribution during tensile deformation of nanostructured aluminum samples

Jacob Kidmose, L. Lu, Grethe Winther, Niels Hansen, Xiaoxu Huang

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

To optimize the mechanical properties, especially formability, post-process deformation by cold rolling in the range 5–50 % reduction was applied to aluminum sheets produced by accumulative roll bonding to an equivalent strain of 4.8. During tensile testing high resolution maps of the strain distribution over the tensile sample gage length were obtained in situ using a commercial ARAMIS system. Significant improvements in total elongation from 6 to 13.3 % and in post-UTS uniform elongation from zero to 4.4 % were observed when introducing
a post-process deformation step and the observations were underpinned by the in situ observations of the evolution of strain distribution in the sample during tensile straining. The mechanisms responsible for the enhancement were discussed based on strain rate sensitivity measurements and microstructural observations.
Original languageEnglish
JournalJournal of Materials Science
Volume47
Pages (from-to)7901-7907
ISSN0022-2461
DOIs
Publication statusPublished - 2012

Bibliographical note

Electronic supplementary material The online version of this article (doi:10.1007/s10853-012-6718-2) contains supplementary
material, which is available to authorized users.

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