Influence of plastic slip localization on grain boundary stress fields and microcrack nucleation

- Slip localization occurs frequently during plastic deformation of metallic polycrystals.
- It is known to trigger grain boundary (GB) brittle fracture.
- Based on FEs computations, analytical formulae are proposed for decribing GB stress fields.
- The predicted remote stress to GB microcracking is lower than predicted by pile-up theories.
- It is closer to experimental data due to the finite thickness of slip bands.