Rev.Adv.Mater.Sci. (RAMS)
No 2, Vol. 27, 2011, pages 189-194

DEFORMATION TWINNING THROUGH NANOSCALE IDEAL
SHEARS IN NANO- AND POLYCRYSTALLINE MATERIALS
AT ULTRA HIGH STRESSES

I.A. Ovid'ko and A.G. Sheinerman

Abstract

A special micromechanism of deformation twinning in nano- and polycrystalline materials is suggested and theoretically described. The micromechanism represents the formation of nanoscale deformation twins through consequent events of nanoscale ideal shear. It is theoretically demonstrated that the special micromechanism of deformation twinning can occur in the non-barrier way in nano- and polycrystalline materials deformed at ultra high stresses.

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