Abstract: A method for analyzing a scratch from a scratch test includes (a) locating the beginning of the scratch relative to a reference position, (b) making the scratch on a bulk with an indenter while recording the applied force and at least one measurement parameter, as a function of the displacement of the indenter relative to the reference position, (c) acquiring and recording images of the scratch relative to the reference position, (d) synchronizing the recorded images, the applied force and the measurement parameter, as a function of the displacement of the indenter, (e) displaying curves of the applied force and of the measurement parameter as a function of the displacement of the indenter, and (f) displaying in a synchronized way an image of the scratch reconstructed from the recorded images.

Abstract: A measuring head for a nano-indentation instrument capable of positioning a sample relatively to the measuring head, which includes a measuring axis, a reference axis and a component for detecting a depth of penetration of an indentor into the sample. The measuring and reference axes are attached to a frame for connection to the instrument. The measuring axis incorporates an actuator and includes the indentor, the reference axis incorporates an actuator and includes a reference tip, and the measuring and reference axes each have a component for detecting a force applied by its actuator. Penetration depth is detected by measuring a displacement of the indentor relatively to the reference tip.

Abstract: The invention relates to a method for analyzing a scratch from a scratch test, applying a digital image acquisition device, a bulk and an indenter for applying a force on the bulk, the method comprising the following steps: determining the position of the beginning of the scratch relatively to the reference position, making the scratch on the bulk by means of the indenter while recording the applied force and at least one measurement parameter, as a function of the displacement of the indenter on the bulk relatively to the reference position, acquiring and recording the images of the whole of the significant portion of the scratch, the position on the scratch corresponding to the recorded images, being determined relatively to the reference position, synchronization of the recorded images, of the applied force and the measurement parameter, as a function of the displacement of the indenter, displaying the curves of the applied force and of the measurement parameter as a function of the displacement of the