Fatigue tests of precipitation-hardened material were simulated in 3D using a new parallel discrete dislocation dynamics code. Simple geometries were used for the simulation volume and the particles. The evolution of the particle’s strength by shearing-off was assumed in a simplified manner in order to study the effects of shearable and non-shearable particles on the formation of the PSBs. The simulated microstructural features of fatigue were in good qualitative agreement with experimental observations. dislocation mechanisms for PSBs formation were detailed here.

Dislocation Dynamics Simulations of Fatigue of Precipitation-Hardened Materials. C.S.Shin, M.C.Fivel, M.Verdier, C.Robertson: Materials Science and Engineering A, 2005, 400-401, 166-9