Effect of Ion Implantation on Fatigue Strength of Martensitic Stainless Steel and Surface Hardness Evaluation by Ultra Micro Hardness Tester.

The effect of surface modification by ion implantation on the fatigue strength of 13Cr martensitic stainless steel was first described. Then the relationship between the fatigue performance and the surface microhardness of the material was dealt with. N+ ions were implanted into the specimen surface with doses in the range of 5×1013ions/cm2∼5×1017ions/cm2 with energy level of 350keV. The results of out-of-plane bending fatigue tests revealed...