Abstract

The effect of ion implantation (aluminum, boron or chromium) on the tensile and strain or stress controlled fatigue behavior of polycrystalline copper has been studied. The monotonic and cyclic stress- strain relationships, cyclic strain-life and stress-life relationships, cyclic deformation characteristics and crack nucleation behavior of implanted copper are compared with unimplanted copper. Monotonic and cyclic flow stresses are reduced by ion implantation. Life under strain controlled fatigue is improved by ion implantation. Aluminum implantation has the greatest effect on both flow-stress reduction and life improvement. Life under stress controlled fatigue may or may not be improved by implantation. Aluminum and chromium implantation produces a significant improvement whereas boron implantation causes a reduction in the resistance to stress cycling.

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