Effects of solution treatment, precipitation hardening, and shot peening on the cavitation erosion resistance of 17‑4PH steel produced by additive and conventional methods

for the untreated conventional specimen, representing an improvement of approximately 216%. The superior cavitation performance of the DMLS material was associated with broader retention of the α/γ microstructure after post-processing, indicating that CER is governed not only by hardness, but also by phase constitution and the condition of the near-surface layer.