Article
An investigation of the residual stress characterization and relaxation in peened friction stir welded aluminum–lithium alloy joints
Materials and Design
(2009)
Abstract
In this investigation the residual stresses generated from friction stir welded (FSW) 2195 aluminum–lithium alloy joints were characterized. The results derived from this research revealed significant levels of tensile residual stresses at the surface and throughout the thickness of the FSW samples. Furthermore, residual stress relaxation at the surface and throughout the thickness of the samples was assessed for laser peened friction stir welded aluminum–lithium joints. To do so the samples were cycled several times at a constant amplitude load. The results indicated that most of the relaxation for the surface residual stresses took place during the first cycle of loading. Also, residual stresses relaxation throughout the thickness of the welded region of unpeened samples significantly exceeded the relaxation exhibited by the laser peened samples.
Keywords
- non-ferrous metals and alloys,
- surface treatment,
- fatigue
Disciplines
Publication Date
2009
Publisher Statement
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Citation Information
Omar Hatamleh, Iris V. Rivero and Shayla E. Swain. "An investigation of the residual stress characterization and relaxation in peened friction stir welded aluminum–lithium alloy joints" Materials and Design Vol. 30 Iss. 9 (2009) Available at: http://works.bepress.com/iris_rivero/5/