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Evaluation of surface residual stresses in friction stir welds due to laser and shot peening
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lyons, Jed Rivero, Iris V. Hatamleh, Omar |
| Copyright Year | 2007 |
| Description | The effects of laser, and shot peening on the residual stresses in Friction Stir Welds (FSW) has been investigated. The surface residual stresses were measured at five different locations across the weld in order to produce an adequate residual stress profile. The residual stresses before and after sectioning the coupon from the welded plate were also measured, and the effect of coupon size on the residual stress relaxation was determined and characterized. Measurements indicate that residual stresses were not uniform along the welded plate, and large variation in stress magnitude could be exhibited at various locations along the FSW plate. Sectioning resulted in significant residual stress relaxation in the longitudinal direction attributed to the large change in dimensions in this direction. Overall, Laser and shot peening resulted in a significant reduction in tensile residual stresses at the surface of the specimens. |
| File Size | 289712 |
| Page Count | 15 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20070007326 |
| Archival Resource Key | ark:/13960/t12p03f52 |
| Language | English |
| Publisher Date | 2007-01-01 |
| Access Restriction | Open |
| Subject Keyword | Metals And Metallic Materials Welded Joints Stress Relaxation Tensile Stress Lasers Metal Plates Friction Stir Welding Shot Peening Residual Stress Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
