Crack propagation predominantly along grain boundaries. Boundary cavities, chemical segregation and environmental attack are possible contributors; fracture appearance alone does not establish which caused failure.
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Intergranular fracture is a type of failure that occurs along the grain boundaries of a material, rather than through the grains themselves. This type of fracture is often associated with certain conditions such as: 1. **Material Structure**: Intergranular fractures are typically seen in crystalline materials where the failure occurs at the interfaces between individual grains.