On the differences in shear band characteristics between a binary Pd-Si metallic and nanoglass

Shear band morphology of a binary Pd80Si20 nanoglass (NG) and metallic glass (MG) was investigated using bonded interface indentation technique. The results clearly indicate that the plastic strain in the subsurface deformation zone in NG is accommodated by very fine secondary shear bands in addition to a fewer primary shear bands while in MG it is mainly by primary shear bands. Furthermore, at any given indentation load, the size of the normalized subsurface deformation zone, chi, is found to be higher for NG compared to MG suggesting that the deformation of Pd80Si20 NG is more pressure sensitive and softer than MG. These differences in deformation characteristics between the NG and MG closely related to the intrinsic differences in the glass structure. (C) 2020 Published by Elsevier Ltd on behalf of Acta Materialia Inc.

Automated summary

The study found significant differences in deformation behavior between Pd80Si20 nanoglass and metallic glass, with the former accommodating plastic strain through fine secondary shear bands in addition to primary shear bands, while the latter mainly relying on primary shear bands for plastic deformation; Pd80Si20 nanoglass is more pressure sensitive and softer compared to metallic glass.