Microstructure-sensitive fatigue crack nucleation in a polycrystalline Ni superalloy

  title={Microstructure-sensitive fatigue crack nucleation in a polycrystalline Ni superalloy},
  author={V.V.C. Wan and Jun Jiang and Duncan MacLachlan and Fionn P.E. Dunne},
Abstract Large-grained polycrystalline Ni alloy RS5 has been tested in fatigue. Morphology and texture have been characterised using EBSD and utilised to construct representative 3D finite element crystal plasticity models. A stored energy criterion has been used to predict scatter in fatigue crack nucleation life and the results compared with experimental findings. Good quantitative prediction of experimental fatigue lives is obtained. The observed progressive increase in scatter with… CONTINUE READING