Abstract
The results are given of an experimental study of the normal-approachload relationship for steel spheres on steel plates covered with ion-plated lead films. It is found that the degree of plastic deformation is large at high loads for the thickest films (15 μm). With the thinnest films (1 μm) the degree of plastic deformation is of the same order as that associated with the deformation of the surface texture; this suggests that for such thin films an elastic theory for such composite materials is appropriate.
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