Abstract
In the present study, fatigue tests were conducted on a zirconium-based bulk metallic glass (BMG), BMG-11 (Zr-10Al-5Ti-17.9Cu-14.6Ni, atomic percent), in air and vacuum to elucidate the possible environmental effects. In air, the fatigue endurance limit and the fatigue ratio were found to be 907 MPa and 0.53, respectively. These values are better than many conventional high-strength crystalline alloys. Unexpectedly, the fatigue lifetimes in vacuum were found to be lower than in air. Additional testing indicated that dissociation of residual water vapor to atomic hydrogen in the vacuum via a hot-tungsten-filament ionization gauge, and subsequent hydrogen embrittlement of the BMG-11, could have been a factor causing the lower fatigue lifetimes observed in vacuum. Published by Elsevier Science Ltd.
| Original language | English |
|---|---|
| Pages (from-to) | 1125-1129 |
| Number of pages | 5 |
| Journal | Intermetallics |
| Volume | 10 |
| Issue number | 11-12 |
| DOIs | |
| State | Published - Nov 2002 |
| Externally published | Yes |
Funding
The authors are grateful to the National Science Foundation Integrative Graduate Education and Research Training (IGERT) Program on Materials Lifetime Science and Engineering, managed by Dr. Wyn Jennings and Dr. Larry Goldberg, and to the Division of Materials Science and Engineering, Department of Energy, under contract DE-AC05–00OR22725 with the Oak Ridge National Laboratory (ORNL), operated by UT-Battelle, LLC., for support of this research. Also, the authors wish to thank Dr. Ken Liu of ORNL for his advice and consultation in the design of the fatigue gripping system.
| Funders | Funder number |
|---|---|
| Division of Materials Science and Engineering | |
| IGERT | |
| National Science Foundation Integrative Graduate Education and Research Training | |
| UT-Battelle | |
| U.S. Department of Energy | DE-AC05–00OR22725 |
| Oak Ridge National Laboratory |
Keywords
- B. Glasses, metallic
- Fatigue