000202921 001__ 202921
000202921 005__ 20181203023642.0
000202921 0247_ $$2doi$$a10.1016/j.actamat.2008.04.027
000202921 022__ $$a1359-6454
000202921 037__ $$aARTICLE
000202921 245__ $$aSolute strengthening of both mobile and forest dislocations: The origin of dynamic strain aging in fcc metals
000202921 260__ $$c2008
000202921 269__ $$a2008
000202921 336__ $$aJournal Articles
000202921 520__ $$aA full rate-dependent constitutive theory for dynamic strain aging is developed based on two key ideas. The first idea is that both solute strengthening and forest strengthening must exist and must exhibit aging phenomena. The second idea is that a single physical aging mechanism, cross-core diffusion within a dislocation core, controls the aging of both the solute and forest strengthening mechanisms. All the material parameters in the model, apart from forest dislocation density evolution parameters, are derivable from atomistic-scale studies so that the theory contains essentially no adjustable parameters. The model predicts the steady-state stress/strain/strain-rate/temperature/concentration dependent material response for a variety of Al-Mg alloys, including negative strain-rate sensitivity, in qualitative and quantitative agreement with available experiments. The model also reveals the origin of non-additivity of solute and forest strengthening, and explains observed non-standard transient stress behavior in strain-rate jump tests. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
000202921 6531_ $$aal-mg alloys
000202921 6531_ $$aaluminum
000202921 6531_ $$aaluminum alloys
000202921 6531_ $$abehavior
000202921 6531_ $$aconstitutive equations
000202921 6531_ $$acopper-alloys
000202921 6531_ $$adeformation
000202921 6531_ $$aDislocations
000202921 6531_ $$ainstabilities
000202921 6531_ $$aonset
000202921 6531_ $$aplastic deformation
000202921 6531_ $$arate sensitivity
000202921 6531_ $$aserrated flow
000202921 6531_ $$asolid-solutions
000202921 6531_ $$astrain-rate sensitivity
000202921 700__ $$aSoare, M. A.
000202921 700__ $$0246474$$aCurtin, W. A.$$g211624
000202921 773__ $$j56$$q4046-4061$$tActa Materialia
000202921 909C0 $$0252513$$pLAMMM$$xU12614
000202921 909CO $$ooai:infoscience.tind.io:202921$$pSTI$$particle
000202921 937__ $$aEPFL-ARTICLE-202921
000202921 970__ $$asoare_solute_2008/LAMMM
000202921 973__ $$aOTHER$$rREVIEWED$$sPUBLISHED
000202921 980__ $$aARTICLE