Abstract
This paper provides a description of the features and mechanisms of facetted short crack growth in Ni-base superalloys, and briefly reviews existing short crack growth models in terms of their application to Ni-base alloys.
The concept of “soft barriers” is introduced to produce a new two-phase model for local microstructural effects on short crack growth in Waspaloy. This is derived from detailed observations of crack growth through individual grains. The model differs from all previous approaches in highlighting the importance of crack path perturbations within grains. Potential applications of the model in alloy development are discussed.
The concept of “soft barriers” is introduced to produce a new two-phase model for local microstructural effects on short crack growth in Waspaloy. This is derived from detailed observations of crack growth through individual grains. The model differs from all previous approaches in highlighting the importance of crack path perturbations within grains. Potential applications of the model in alloy development are discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 595-606 |
| Number of pages | 12 |
| Journal | Fatigue and Fracture of Engineering Materials and Structures |
| Volume | 15 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 1992 |
Keywords
- nickel and alloys
- short crack growth
- two-phase model
- superalloys
- mathematical models