Fatigue Crack Propagation Rates and Local Texture Relationship in 2099-T83 Al-Li Alloy
| Periodical | Advanced Materials Research (Volume 409) |
|---|---|
| Main Theme | THERMEC 2011 Supplement |
| Edited by | T. Chandra, M. Ionescu and D. Mantovani |
| Pages | 9-14 |
| DOI | 10.4028/www.scientific.net/AMR.409.9 |
| Citation | Franck Armel Tchitembo Goma et al., 2011, Advanced Materials Research, 409, 9 |
| Online since | November, 2011 |
| Authors | Franck Armel Tchitembo Goma, Daniel Larouche, Carl Blais, Raynald Gauvin, Julien Boselli, Alexandre Bois-Brochu, Mathieu Brochu |
| Keywords | Al-Li Alloys, Extrusion Aspect Ratio, Fatigue Crack Propagation, Local Texture |
| Price | US$ 28,- |
An integrally stiffened panel (ISP) made from extruded 2099-T83 Al-Li alloy was subjected to fatigue loadings to investigate the influence of both the local texture and grain structure on fatigue crack propagation (FCP) behavior. The microstructure was mainly unrecrystallized. Grains were mostly layered in the web and fibrous in the other locations. Fiber texture components were present in the stiffener locations, and a rolling-type texture in the web. Resistance to FCP decreases as the local aspect ratio increases. Changes in FCP rates in the web, stiffener base and stiffener web were consistent with the microstructural features and texture. The stiffener cap with a strong fiber texture similar to that of the stiffener base exhibited a lower resistance to FCP, suggesting that the influence of the texture is convoluted in the stiffener cap by the markedly different grain structure. Therefore, FCP behavior in this alloy appears to be governed by both texture and grain structure.
