000203479 001__ 203479
000203479 005__ 20181203023707.0
000203479 0247_ $$2doi$$a10.1080/14786430903097715
000203479 022__ $$a1478-6443
000203479 037__ $$aARTICLE
000203479 245__ $$aPlastic deformation by conservative shear-coupled migration of tilt boundaries with intergranular nano-cracks or precipitates
000203479 260__ $$c2010
000203479 269__ $$a2010
000203479 336__ $$aJournal Articles
000203479 520__ $$aWe present molecular dynamics (MD) simulations of the shear-coupled migration (SCM) behaviour of symmetrical tilt boundaries perturbed by the presence of nano-cracks or nano-precipitates lying on the boundary plane. The simulations have been performed for copper bicrystals at room temperature (300 K). The tilt boundary gets pinned by the crack tip or precipitates; shear-coupled migration occurs only ahead of the pinning points. Bulging of the tilt boundary reduces the shear stress on the boundary surface near the pinning points. In the case of cracks, the local deviation of the boundary from the crack plane close to the crack tip hinders mode II crack propagation; in fact, crack healing is observed in some cases. The applied stress grows until depinning of the boundary takes place by SCM bulging or by the combined action of SCM with another deformation mechanism (emission of dislocations from the pinning point vicinity, grain boundary sliding).
000203479 700__ $$0246479$$g222139$$aLuque Gomez, Aitor
000203479 700__ $$aAldazabal, J.
000203479 700__ $$aMartínez-Esnaola, J.M.
000203479 700__ $$aGil Sevillano, J.
000203479 773__ $$j90$$tPhilosophical Magazine$$k27-28$$q3743-3756
000203479 909C0 $$xU10306$$0252446$$pIGM
000203479 909CO $$pSTI$$particle$$ooai:infoscience.tind.io:203479
000203479 917Z8 $$x222139
000203479 917Z8 $$x222139
000203479 937__ $$aEPFL-ARTICLE-203479
000203479 973__ $$rREVIEWED$$sPUBLISHED$$aOTHER
000203479 980__ $$aARTICLE