000015135 001__ 15135
000015135 005__ 20161115100212.0
000015135 04107 $$aeng
000015135 046__ $$k2016-08-21
000015135 100__ $$aFan, Zhengxuan
000015135 24500 $$aAtomistic simulation of surface cyclic slip irreversibility in FCC metals

000015135 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000015135 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000015135 506__ $$arestricted
000015135 520__ $$2eng$$aThe mechanical behaviour of surface steps created by the emergence at the free surface of gliding dislocations, subjected to cyclic loading is examined using molecular dynamics simulations. Different face centred cubic metals, Al, Cu, Ag and Ni are analysed. An atomistic reconstruction phenomenon is observed at these surface steps which can induce strong irreversibility. The irreversibility cumulates and a micro- notch is produced whose depth increases cyclically. A rough estimation of surface irreversibility for pure edge dislocations gives an irreversibility fraction between 0.5 and 0.75 in copper. An analysis coupling surface mechanisms with the classical EGM bulk slip irreversibility model gives an irreversibility fraction of 0.62 in copper for pure screw dislocations, contrary to many sketches proposed in the past. It seems that oxygen molecules cannot lead to higher irreversibility as they have no major influence on different mechanisms linked to surface relief evolution.

000015135 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015135 653__ $$a

000015135 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000015135 720__ $$aFan, Zhengxuan
000015135 8560_ $$ffischerc@itam.cas.cz
000015135 8564_ $$s237045$$uhttps://invenio.itam.cas.cz/record/15135/files/TS.SM03-1.06.pdf$$yOriginal version of the author's contribution as presented on CD,  page 1816, code TS.SM03-1.06
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000015135 962__ $$r13812
000015135 980__ $$aPAPER