Influence of conventional and cryogenic piezo peening on bending fatigue strength of hardened bearing steel AISI 52100

摘要

Machine hammer peening (MHP) treatments have become a crucial process step in the fabrication of molds and dies, which is mainly due to the generation of smooth surfaces in connection with compressive residual stresses (RS) and work-hardening [1]. Developed at Karlsruhe Institute of Technology (KIT), piezo peening (PP) is a modern MHP treatment capable of generating a large bandwidth of (anisotropic) RS and work-hardening states with penetration depths between 100 μm and 1 mm [2, 3]. By this means, greatly enhanced fatigue behavior could be achieved on quenched and tempered low alloy steel AISI 4140 in previous studies [4].