多結晶銅の圧縮塑性変形に伴う接触面のあれ

概要

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Roughening of the internal contact surface of polycrystalline copper during compressive plastic deformation is studied. Rectangular split block specimens with initially flat contact surface are pressed against each other. The roughening of the internal surface as well as that of the free side surface is measured with a stylus instrument. It is found that the degree of roughening of the internal surface increases in proportion to the applied strain, but that the magnitude is about half that of the free surface. The detailed shape of the surface roughness curve of the internal surface is different from that of the free surface. From observation with a scanning electron microscope, it is seen that mountains and valleys appearing on the free surface are sharp, while those appearing on the internal contact surface are rather rounded.
1995-07-25