Dominant shear bands observed in amorphous ZrCuAl nanowires under simulated compression

Details Dominant shear bands observed in amorphous ZrCuAl nanowires under simulated compression Dominant shear bands observed in amorphous ZrCuAl nanowires under simulated compression

2012-03-15

arxiv.org/abs/1203.3553v1

Physics

Condensed Matter

Materials Science

5 pages, 2 figures, to be appeared in MRS Communications

Scientific paper

10.1557/mrc.2011.26

We observed the formation of dominant shear bands in model ZrCuAl metallic glass (MG) nanowires (18-nm-long) in molecular dynamics simulations, which implies size-independent incipient plasticity in MG materials. The MG nanowires were prepared using the simulated casting technique to ensure proper relaxation of sample surfaces. Under uniaxial compression, shear bands initiate at the surfaces and lead to reduced icosahedral short-range order. The shear band formation is sensitive to sample thermal-history, which calls for careful consideration of sample preparation effects in both experimental and numerical studies of size-effect in MG samples.

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