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Effects of different r ratios on fatigue crack growth in laser peened friction stir welds
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hackel, Lloyd Forth, Scott Hatamleh, Omar |
| Copyright Year | 2007 |
| Description | The influence of laser peening on the fatigue crack growth behavior of friction stir welded (FSW) Aluminum Alloy (AA) 7075-T7351 sheets was investigated. The surface modification resulting from the peening process on the fatigue crack growth of FSW was assessed for two different R ratios. The investigation indicated a significant decrease in fatigue crack growth rates resulting from using laser shock peening compared with unpeened, welded and unwelded specimens. The slower fatigue crack growth rate was attributed to the compressive residual stresses induced by the peening. |
| File Size | 230098 |
| Page Count | 5 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20070009999 |
| Archival Resource Key | ark:/13960/t56f0th43 |
| Language | English |
| Publisher Date | 2007-01-01 |
| Access Restriction | Open |
| Subject Keyword | Metals And Metallic Materials Welded Joints Compressibility Lasers Friction Stir Welding Fatigue Materials Aluminum Alloys Peening Residual Stress Crack Propagation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
