| Autor: |
J.W. Blust, Charlie R. Brooks, A.K. Bhattacharya, L.J. Chen, S.A. Thompson, Gongyao Wang, Peter K. Liaw, P.F. Browning, Y.L. Lu, Dwaine L. Klarstrom, J.M. Aurrecoechea |
| Rok vydání: |
2006 |
| Předmět: |
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| Zdroj: |
Materials Science and Engineering: A. 429:1-10 |
| ISSN: |
0921-5093 |
| DOI: |
10.1016/j.msea.2005.07.039 |
| Popis: |
The creep-fatigue crack-growth behavior of a HAYNES 230 superalloy was investigated at the temperatures of 649, 816 and 927 °C in laboratory air. The crack-growth experiments were conducted under the stress-intensity-factor-range or load-range control. Hold times in the range of 3 s to 5 h were imposed at the maximum load to study the influence of hold time on the crack-growth behavior. The fatigue and creep crack-propagation experiments were also performed as zero and infinite hold-time experiments, respectively. The crack-growth rate increased continuously with increasing the test temperature and/or hold time. The fracture surfaces and cross-sections through the fracture surfaces were examined. As the hold time increased, the fracture appearance changed from the transgranular to intergranular mode. At higher temperatures, this transgranular–intergranular transition occurred at a shorter hold time. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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