The development of grain-orientation-dependent residual stressess in a cyclically deformed alloy

摘要: There have been numerous efforts to understand and control the resistance of materials fracture by repeated or cyclic stresses. The micromechanical behaviours, particularly distributions stresses on scale grain size during after mechanical electrical fatigue, are crucial a full understanding damage mechanisms in these materials. Whether large microstress develops deformation with small amount monotonic strain but accumulated remains an open question. Here, we report neutron diffraction investigation development intergranular stresses, which vary as function orientations, 316 stainless steel high-cycle fatigue. We found that stress developed before cracks started appear. With further increase fatigue cycles, decreased, while elastic intragranular stored energy continued grow. One implication our findings is ratio between energies various stages may validate mechanism can be used fingerprint for monitoring state