| About this Abstract |
| Meeting |
2010 TMS Annual Meeting & Exhibition
|
| Symposium
|
General Abstracts: Structural Materials Division
|
| Presentation Title |
Fatigue Crack Growth Mechanisms of Long and Small Cracks in Structural Materials |
| Author(s) |
Anastasios G. Gavras, Christopher J. Lammi, Diana A. Lados |
| On-Site Speaker (Planned) |
Anastasios G. Gavras |
| Abstract Scope |
Fatigue crack growth mechanisms of long and small cracks were investigated in cast and wrought aluminum and titanium alloys (as-cast A535, 6061-T6, and Ti-6Al-4V) with various microstructures. The effects of microstructure and bulk residual stresses on the fatigue crack growth response of each material were evaluated. Bulk residual stresses were introduced in the testing specimens through quenching. Long crack growth data were generated on compact tension specimens tested at low and high stress ratios (R=0.1 and R=0.7). Small crack growth testing was performed on surface flaw tension specimens at low stress ratio (R=0.1). Closure and microstructurally small crack growth mechanisms in samples with low and high residual stress levels were identified and related to the characteristic features of the materials. Corrective techniques compensating for residual stress, closure, and microstructural effects on fatigue crack growth data will be presented and discussed. |
| Proceedings Inclusion? |
Definite: A CD-only volume |