Abstract

When a smooth sample surface is scratched by an indenter at constant normal load and driving speed, a macroscopically smooth groove is expected to be made on the surface. However, microscopically the scratch deformation is not stable, damage occurs intermittently along the scratching path so that recurrent morphology appears on the scratched surface. Examples of such morphology are described and deformation mechanisms are discussed together with the characteristics of horizontal force during the scratching of three polymers.

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