O. Zinovieva et al.
ristics of surface roughness and deformation processes in polycrystalline AL6061-T3 aluminum alloy at the
mesoscale under quasi-static tension. It is shown that the increase of grain size leads to the formation of larger
relief folds on the surface of polycrystals loaded. Periodic BCs also cause the formation of higher folds with
lower period by comparison with the loaded specimen with free lateral surfaces. In order to optimize numerical
calculations, we determine the minimum thickness of the specimen for the study of the surface roughness phe-
nomena. It is of 3 - 4 average grain diameters.
Acknowledgem ents
This work is partially supported by Federal Targeted Programme “R & D in Priority Areas of Science and
Technology Sector of Russian Federation in 2014-2015” and Russian Foundation for Basic Research (grant No.
14-08-00277 А).
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