Tailoring the Hardening Behavior of 18CrNiMo7-6 via Cu Alloying
Margarita D. Bambach, Wolfgang Bleck, Hendrik S. Kramer, Marcus Klein, Dietmar Eifler, Tilmann Beck, Holger Surm, Hans-Werner Zoch, Franz Hoffmann and Aurel Radulescu
Article first published online: 10 AUG 2015 | DOI: 10.1002/srin.201500129
To improve the fatigue behavior of gear steels, a concept to increase their damage tolerance is developed. Cu is used in order to trigger nano-sized Cu precipitates, which shall improve the strain-hardening rate of the martensitic matrix of Cu-alloyed 18CrNiMo7-6 steel surrounding a non-metallic inclusion during plastic deformation. Fatigue tests reveal an increased damage tolerance for Cu-alloyed 18CrNiMo7-6 steel.