AUTHOR=Adjaoud Omar , Albe Karsten 

TITLE=Mechanical Properties of Glassy Nanopillars: A Comparative, Computational Study of Size Effects in Nanoglasses and Homogeneous Bulk Glasses

JOURNAL=Frontiers in Materials

VOLUME=Volume 7 - 2020

YEAR=2020

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2020.544660

DOI=10.3389/fmats.2020.544660

ISSN=2296-8016

ABSTRACT=We study the mechanical properties of nanoglass (NG) nanopillars  with diameters from  \unit[4.5]{nm} to \unit[54]{nm} by means of molecular dynamics simulations and compare the results with  those obtained for  nanopillars prepared from  homogenous bulk glasses.  Nanoglass 
nanopillars of two different types of glasses, namely Cu$_{64}$Zr$_{36}$ and  Pd$_{80}$Si$_{20}$, were cut from samples prepared by nanoparticle consolidation. The influence of nanopillar diameter on the deformation behavior and strain localization is investigated. Moreover,
 cyclic loading is used to explore the origin of stress overshoots in the stress-strain curves of NGs. Finally, from the calculated properties a deformation map for NG and HG nanopillars is derived.