Postprint version. Published in Scripta Materialia, Volume 57, Issue 3, May 1, 2007, pages 269-272.
The definitive version is available at https://doi.org/10.1016/j.scriptamat.2007.03.045.
Friction stir processing (FSP) 2519-T87 aluminum plate results in enhanced ductility, 25% strain at fracture. However, the yield strength in the FSP zone drops to 175 MPa from ~400 MPa. Actively cooling the plate during FSP increases the yield strength to 185 MPa and decreases ductility to 20% strain at fracture. Thick bending of a plate of the alloy was demonstrated after the surface was subjected to FSP.
Materials Science and Engineering