indent

The following Table 1 describes about the material properties of selected specimen and indenter. Continuous indentation was done on the AA3003 specimen by loading even beyond the yield strength.

The shrunken indenter size may be responsible for these lower ratios.

Following numerical simulations, axial crack propagation affected by spherical indenter was focused similarly as shown in Fig.

The contact problem was modelled using axisymmetric rigid indenter as master surface interacting with axisymmetric deformable substrate as slave surface [13].

For Nanoindentation on rough surfaces, it is necessary to find and position the indenter directly on a relatively smooth area.

In this study, scratching tests were examined on two types of paperboards, a black-ink layer printed surface and a white-clay layer coated surface, with three scratching indenter diameters under constant scratching rates to investigate the abrasion phenomenon and the fracture behaviors within the very thin depth region of 50 urn.

The tests were carried out on both specimens using diamond Rockwell indenter with the tip radius of 200 [mu]m.

With that end in view we used a force sensor to measure the force applied to indenter, a mechanical system for the cycle of loading and unloading and an electronic system to calculate the depth of penetration The equipment consists of an electromechanical loading and unloading system, made by a cam shaft, which runs a constant and known path for indenter, at full rotation of the shaft.

One such is the indenter, which measures force and displacement for modulus and other readings.

If the indenter is damaged it can be exchanged and replaced by the user.

The indenter is placed on the specimen, which usually is heated, either isothermally or at a programmed rate, by a built-in furnace.

The basic premise of all indentation techniques is that a hard material of specified shape (indenter) is pressed into the surface of a softer material (substrate) with sufficient force that the softer material deforms (Fig.