MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
A Comparison of the Effects of Pre-ECAR and Post-ECAR Aging on Microstructure and Strengthening in 7050 Al Alloy Sheet
Jun-Hyun Han
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2010 Volume 51 Issue 11 Pages 2109-2112

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Abstract

Effects of the post-ECAR aging treatment on the microstructural evolution and strengthening were compared with those of the pre-ECAR aging for a wrought 7050 Al alloy sheet that was subjected to severe plastic deformation (SPD) through multiple equal channel angular rolling (ECAR). The post-ECAR aging treatment led to the formation of a nanocrystalline structure with a grain size of ∼100 nm through the precipitation of fine MgZn2 particles during post-ECAR aging, which pinned the grain boundary motion, and more effectively strengthened the 7050 Al alloy than the pre-ECAR aging.

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© 2010 The Japan Institute of Metals and Materials
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