The mechanical characterization of the Fe2B layer was performed on three different distances from the surface using a range of indentation loads (10 to 500 mN) for each distance.
The simulation cases cover a wide range of indentations and semi-apex angles of the cone-shaped rocks.
The present method provides the advantage of allowing the mechanical properties of the coating varying in a wide range of indentation depths to be simply be obtained through one composite response with a high indentation load.
An energy method, which was derived from the work of indentation, gave similar Vickers hardness numbers over a wide range of indentation depths (up to 25% of the coating thickness).
Important constituents of the approach include: (1) the design of the ion irradiation experiments, e.g. using the Monte Carlo binary collision code SRIM, (2) nanoindentation testing over a large range of indentation depths, and (3) proper consideration of the indentation size effect, the substrate effect and the pile-up effect.
Both spherical and pyramidal indenters (i.e. Berkovich and Vickers) were used to determine the mechanical response of the NiTi alloys over a wide range of indentation loads and depths.
The fact that multiple "pop-in" events are observable over such a wide range of indentation load and penetration depth indicates the close relations to the plastic deformation of GaN thin films.
In fact, the multiple pop-ins are observable over such a wide range of indentation load and the penetration depth indicates the close relations to the plastic deformation of AlN thin film.
The semi-infinite thickness assumption holds when the range of indentations used is much smaller than the thickness of the sample.
Hardness response of electroplated nickel coatings on copper substrates was studied over a range of applied loads and two decades of indentation depths.
Fracture toughness values were also determined by Vickers indentation over a range of loads; theKIc values determined from the Hertzian tests were consistent with the trends inKIc with crack size from the Vickers indentation tests.
