Experimental and theoretical investigations of
nanoindentation into fcc silver and bcc iron were
performed, including an investigation of the effect near the grain
boundaries. Experimentally, micrograph images of the surfaces
and force-depth curves were obtained which were used to
determine the hardness and Young's modulus of the materials.
Molecular dynamics simulations, on smaller systems than those
investigated experimentally, exhibit the main experimental
attributes, showing the plastic deformation of the substrates
with piling-up of the work material along the indenter sides.
The simulations also show how defects in the substrates form and
these are contrasted with the various materials under
investigation.
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