Wedge crack growth enhanced by vacancy diffusion under creep conditions
The creep failure of polycrystalline materials is discussed in terms of a grain boundary sliding mechanism. In the proposed model wedge cracks are nucleated due to grain boundary sliding at triple point junctions. The resulting stable cracks grow to a critical size by further boundary sliding and by...
Gespeichert in:
| Veröffentlicht in: | Philosophical magazine (London, England : 1945) England : 1945), 1971-11, Vol.24 (191), p.1215-1220 |
|---|---|
| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| Zusammenfassung: | The creep failure of polycrystalline materials is discussed in terms of a grain boundary sliding mechanism. In the proposed model wedge cracks are nucleated due to grain boundary sliding at triple point junctions. The resulting stable cracks grow to a critical size by further boundary sliding and by diffusion of vacancies to the defects. A failure condition is given which relates the time to fracture to the creep rate, temperature and diffusion characteristics of the material. |
|---|---|
| ISSN: | 0031-8086 |
| DOI: | 10.1080/14786437108217079 |