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Negative Strain-rate Sensitivity in a Nanostructured Aluminum Alloy

✍ Scribed by B. Q. Han; J. Huang; Y. T. Zhu; E. J. Lavernia

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
212 KB
Volume
8
Category
Article
ISSN
1438-1656

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✦ Synopsis

The influence of strain rate in the range of 10^–1^ to 10^–5^ s^–1^ on the compression behavior of a cryomilled 5083 Al alloy is studied. The compression flow stress remains constant after an initial short strain hardening and a small stress dip, which indicates a dynamic saturation of dislocations. It is found that the compression flow stress increases with decreasing strain rate, which is believed to be attributed to dynamic strain aging.

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