Abstract
The use of X-ray residual stress determination as a technique for evaluating the damage incurred by nickel-based, Cr 2O 3-forming superalloy materials under various service conditions (isothermal heating, thermal cycling, applied stress, stressed and cycled) was investigated. Large and small compressive residual stresses were observed for the oxides and the near surface substrates, respectively. It was expected that the applied stresses and thermal cycling would cause an enhanced degree of oxidation damage that would translate into appreciable differences in residual stress values. Differences in the magnitude of residual stress values were not appreciable condition-to-condition, however. An increase in the severity of the oxidizing conditions in the form of longer oxidation times, higher oxidizing temperatures, and a much greater frequency of thermal cycling is suggested for future studies.
| Original language | English |
|---|---|
| Pages (from-to) | 305-318 |
| Number of pages | 14 |
| Journal | Oxidation of Metals |
| Volume | 74 |
| Issue number | 5-6 |
| DOIs | |
| State | Published - Dec 2010 |
Funding
Acknowledgements The samples were provided by Dr. D. L. Klarstrom of Haynes International, Inc., Kokomo, IN. The authors appreciate the advice and aid of Drs. P. Tortorelli, B. Pint, E. Lara-Curzio, W. Ren, R. Swindeman, W. Kai, Y. Lu, M. Morrison, W. H. Peter, R. Steward, M. Benson, B. Green, M. Freels, and R. A. Buchanan. The author is grateful for the help and advice of Mr. M. Neal, Mr. G. Jones, Mr. F. Holiway, Mr. R. Stookesbury, Mr. S. White, Mr. K. Johanns, Mr. J. Shingledecker, Mr. C. Stephens, Mr. K. Kubushiro, Mr. R. Mcdaniels, Mr. A. Chuang, Ms. S. Maples, Ms. C. Lawrence, Ms. C. Winn, Ms. R. Cook, Mr. D. Fielden, and the University of Tennessee machine shop. The authors gratefully acknowledge the financial support from the National Science Foundation (NSF), the Integrative Graduate Education and Research Training (IGERT) Program, under DGE-9987548, DMR-0909037, and CMMI-0900271 to the University of Tennessee (UT), Knoxville, with Drs. C. J. Van Hartesveldt, J. D. Giordan, D. Dutta, L. Clesceri, W. Jennings, L. Goldberg, A. Ardell, and C. V. Cooper as contract monitors, respectively. Portions of this research were conducted at the Oak Ridge National Laboratory’s High Temperature Materials Laboratory User Program sponsored by the U. S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Program. Portions of this research were sponsored by the Industrial Technologies Program, Industrial Materials for the Future Program, Materials Processing Laboratory Users Project, Oak Ridge National Laboratory. Both programs are managed by UT-Battelle, LLC, for the U. S. Department of Energy under contract number DE-AC05-00OR22725. This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes.
| Funders | Funder number |
|---|---|
| Integrative Graduate Education and Research Training | DGE-9987548, DMR-0909037, CMMI-0900271 |
| National Science Foundation | 0900271 |
| U.S. Department of Energy | |
| Office of Energy Efficiency and Renewable Energy | |
| Oak Ridge National Laboratory | DE-AC05-00OR22725 |
| University of Tennessee |
Keywords
- Nickel based superalloys
- Oxidation
- Residual stresses
- X-ray diffraction