|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||GG-10: Effects of Corrosion Damage on the Fatigue Behavior of Dissimilar Friction Stir Welded Aluminum Alloys
||Rogie Rodriguez, JB Jordon, Paul Allison
|On-Site Speaker (Planned)
This work presents a study on the low cycle fatigue behavior of pre-corroded dissimilar friction stir welded AA6061-to-AA7050. Corrosion defects were produced in FSW butt welds after static immersion in 3.5% NaCl for various exposure times. Results revealed localized corrosion damage in the thermo-mechanically affected and heat affected zones. Due to its high corrosion susceptibility, the AA7050 side exhibited more severe corrosion damage when compared to the AA6061. Low cycle fatigue testing demonstrated a decrease in the fatigue life, with evidence of crack initiation at the corrosion defects; however, the fatigue life was nearly independent of exposure time. Furthermore, despite that the extent of corrosion damage was more severe in the AA7050 side, the majority of the joints failed in the AA6061 side. Lastly, a microstructure-sensitive fatigue model was employed to capture the effect of corrosion defects for the life prediction of the dissimilar friction stir welded AA6061-to-AA7050.
||Planned: Publication Outside of TMS (Indicate publication title and publisher if known.)