Fatigue-life improvement by nitrogen-ion implantation on steel: Dose dependence

Abstract

The effect of 30-keV nitrogen-ion implantation on the fatigue lifetime of type 38 NCD4 steel has been investigated. The implants enhance the fatigue lifetime for nitrogen doses between 1017 and 2×1017 ions/cm2. The results suggest that the implantation current density can have an important role, in connection with the thermal diffusion of implanted ions.