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Strain rate sensitivity of Cu after severe plastic deformation by multiple compression
Author(s) -
Li Y. J.,
Blum W.
Publication year - 2005
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200521160
Subject(s) - strain rate , materials science , flow stress , compression (physics) , sensitivity (control systems) , deformation (meteorology) , strain (injury) , grain size , composite material , plasticity , stress (linguistics) , severe plastic deformation , metallurgy , electronic engineering , medicine , linguistics , philosophy , engineering
Coarse‐grained Cu99.99 was prestrained by ε pre in multiple compression in three orthogonal directions at room temperature. While the flow stress σ saturates at ε pre ≈ 2, the strain rate sensitivity of σ at 318 K increases by a factor of ≈ 2.7 from ε pre = 2 to 7. This increase is attributed to decrease of grain size and corresponding increase in fraction of high‐angle grain boundaries. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)