An investigation of boundary friction by ultramicrosclerometry

Microscratching in an electrochemical cell. Effect of gallium on the surface deformation in aluminum

“…The tests become particularly informative for small loads on the indenter, as in micro-and ultramicrosclerometry developed by the authors in [13][14][15][16][17][18]: these methods allow one to observe the appearance of the very first dislocations along the path of the indenter, i.e., elementary events of damage, and the transition from the elastic behavior of the material to its plastic behavior in the contact zone and to the brittle response of the material depending on the pH value, admixtures of surfactants in aqueous solutions, and other characteristics of the medium. The tests become particularly informative for small loads on the indenter, as in micro-and ultramicrosclerometry developed by the authors in [13][14][15][16][17][18]: these methods allow one to observe the appearance of the very first dislocations along the path of the indenter, i.e., elementary events of damage, and the transition from the elastic behavior of the material to its plastic behavior in the contact zone and to the brittle response of the material depending on the pH value, admixtures of surfactants in aqueous solutions, and other characteristics of the medium.…”