Abstract
Residual stresses were generated by severe thermomechanical deformation in an aluminum alloy plate. The evolution of the residual stresses during natural aging was investigated by neutron diffraction up to 10,000 h. A data reduction method was developed to eliminate microstructure influences (solute variations) on the lattice spacing changes, thereby allowing the determination of the long-range macroscopic residual stresses. The residual stress decreased (∼25 MPa) with time due to the microstructural modification within the deformed region during natural aging.
| Original language | English |
|---|---|
| Pages (from-to) | 624-627 |
| Number of pages | 4 |
| Journal | Scripta Materialia |
| Volume | 61 |
| Issue number | 6 |
| DOIs | |
| State | Published - Sep 2009 |
Funding
The research was sponsored by the Assistant Secretary for Energy Efficiency and Renewable Energy, Vehicle Technologies Program, as part of the High Temperature Materials Laboratory User Program, Oak Ridge National Laboratory, managed by UT-Battle, LLC, for the US Department of Energy under contract number DE-AC05-00OR22725. W.W. is supported by the Nuclear Research and Development Program of the Korea Science and Engineering Foundation funded by the Korean government. X.L.W. acknowledges the support from the Office of Basic Energy Sciences, US Department of Energy under Contract DE-AC05-00OR22725 with UT-Battelle, LLC. The authors would like to thank M.I. Ripley, H. Choo, A. Frederick, E.A. Kenik, W.B. Bailey and Y. Yamamoto for their help.
| Funders | Funder number |
|---|---|
| Office of Basic Energy Sciences | |
| US Department of Energy | DE-AC05-00OR22725 |
| Office of Energy Efficiency and Renewable Energy | |
| Oak Ridge National Laboratory | |
| Korea Science and Engineering Foundation |
Keywords
- Aluminum alloy
- Friction stir welding
- Neutron diffraction
- Residual stress
- Time-dependent