Abstract
A pin-on-disk wear rig has been constructed to operate inside the scanning electron microscope to allow direct, high magnification, observation of wear as it occurs. The wear process is recorded on video tape and the variations in normal load and frictional force are measured and recorded using a data-logging system. Experiments using this rig show the formation of sheet- or flake-like debris when high purity copper pins slide on casehardened mild steel disks. The amount of debris produced over the same sliding distance (a measure of the wear rate) is found to be influenced by small variations in the surface roughness of the disks.
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