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Negative Strain‐rate Sensitivity in a Nanostructured Aluminum Alloy
Author(s) -
Han B. Q.,
Huang J.,
Zhu Y. T.,
Lavernia E. J.
Publication year - 2006
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200600164
Subject(s) - materials science , strain rate , flow stress , dynamic strain aging , alloy , strain hardening exponent , strain (injury) , compression (physics) , composite material , metallurgy , hardening (computing) , aluminium , plasticity , saturation (graph theory) , medicine , mathematics , layer (electronics) , combinatorics
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.