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Interactions between Microstructure and Plastic Instabilities in Al‐Zn‐Mg‐Cu Alloy
Author(s) -
Thevenet D.,
MlihaTouati M.,
Zeghloul A.
Publication year - 2000
Publication title -
zamm ‐ journal of applied mathematics and mechanics / zeitschrift für angewandte mathematik und mechanik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.449
H-Index - 51
eISSN - 1521-4001
pISSN - 0044-2267
DOI - 10.1002/zamm.200008014101
Subject(s) - portevin–le chatelier effect , microstructure , dynamic strain aging , materials science , plasticity , alloy , metallurgy , deformation (meteorology) , work (physics) , dislocation , composite material , thermodynamics , physics
In recent years, inhomogeneous plastic deformation associated with the Portevin‐Le Châtelier (PLC) has received a renewed attention. The PLC effect, commonly called 'jerky flow' or Serrated yielding; is the result of dynamic strain ageing due to dynamic interactions between mobile dislocations, temporarily arrested at obstacles, and dissolved alloying atoms, which diffuse towards dislocations ]1[ So, the microstructure can have an important role on the PLC phenomenon and efforts to understand these mechanisms were the subject of previous researches ]2, 3[ In this work, essentially experimental, we have changed the ageing conditions in order to investigate the effects of precipitates on the jerky flow and its characteristics.