| About this Abstract |
| Meeting |
Materials Science & Technology 2012
|
| Symposium
|
Symposium on the Fatigue of Materials II: Advances and Emergences in Understanding
|
| Presentation Title |
The Effect of Dwell Loading on the Small Fatigue Crack Growth at Notches in IN100 |
| Author(s) |
D'Anthony A. Ward, Andrew Rosenberger, Michael Caton , Jha Sushant , Dennis Buchanan |
| On-Site Speaker (Planned) |
D'Anthony A. Ward |
| Abstract Scope |
Small-crack growth is one of the critical inputs for predicting the minimum fatigue life of structural alloys. The present study builds upon our current understanding of the effects of dwell time on small-crack initiation and growth in a smooth geometry and compares it against the dwell effects of small cracks in fracture critical locations associated with areas of high stress concentrations, e.g. bolt holes and notched geometries. Previous studies concluded that the initiation mechanisms are identical in smooth and notched geometries. However, the application of dwell loading results in the development of additional cracking ahead of the main crack that has to be considered. Accounting for this and crack coalescence, the microstructurally small-crack growth is comparable to similar cracks in smooth geometries. Furthermore, the notch-fatigue study indicates that the minimum fatigue life prediction method is applicable for various geometries and therefore, its applicability to actual fielded components holds reasonable promise. |
| Proceedings Inclusion? |
Definite: A combination print-CD volume |