| About this Abstract |
| Meeting |
Materials Science & Technology 2011
|
| Symposium
|
Fatigue and Microstructure: A Symposium on Recent Advances
|
| Presentation Title |
Assessing the Role of Microstructure Variability in the Very High Cycle Fatigue Behavior of Structural Alloys |
| Author(s) |
J. Wayne Jones |
| On-Site Speaker (Planned) |
J. Wayne Jones |
| Abstract Scope |
Fatigue behavior in the Very High Cycle Fatigue (VHCF) has become increasing important. This is driven in part by the extension of service life in the transportation and energy sectors beyond original design lifetimes is becoming more commonplace, requiring improved methods for life prediction and modeling. New designs often specify service lives where fatigue lifetimes on the order of 10<sup>8 </sup>to 10<sup>9</sup> or longer are required. Conventional fatigue test methodologies are inadequate to investigate these very long lifetimes in a practical timeframe. This presentation describes a series of experimental investigations of structural alloys that employs ultrasonic fatigue to examine fatigue crack initiation and initial crack propagation in the VHCF regime, where nominal strains are in the elastic regime. Implications regarding the role of microstructure variability on fatigue life and how this information can be incorporated in life prediction models will be addressed. |
| Proceedings Inclusion? |
Definite: A CD-only volume |