High-temperature tensile-hold crack-growth behavior of HASTELLOY® X alloy compared to HAYNES® 188 and HAYNES® 230® alloys
| Autor: | J.M. Aurrecoechea, Y. L. Lu, Hahn Choo, A.K. Bhattacharya, J.W. Blust, S.A. Thompson, Dwaine L. Klarstrom, P.F. Browning, S.Y. Lee, Peter K. Liaw |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Mechanical Engineering General Chemical Engineering Alloy Direct current Metallurgy Aerospace Engineering Fracture mechanics engineering.material Superalloy Creep Ultimate tensile strength Solid mechanics engineering General Materials Science Composite material Stress intensity factor |
| Zdroj: | Mechanics of Time-Dependent Materials. 12:31-44 |
| ISSN: | 1573-2738 1385-2000 |
| DOI: | 10.1007/s11043-008-9049-6 |
| Popis: | The creep–fatigue crack-growth tests of HASTELLOY® X alloy were carried out at the temperatures of 649°C, 816°C, and 927°C in laboratory air. The experiments were conducted under a constant stress-intensity-factor-range (ΔK) control mode with a R-ratio of 0.05. In the constant ΔK tests, a ΔK of 27.5 MPa $\sqrt{\mathrm{m}}$ and a triangular waveform with a frequency of 0.333 Hz were used. Various tensile hold times at the maximum load were imposed to study fatigue and creep–fatigue interactions. Crack lengths were measured by a direct current potential drop method. In this paper, effects of hold time and temperature on the crack-growth rates are discussed. Furthermore, the crack-growth rates of the HASTELLOY® X alloy are compared to those of the HAYNES® 188 and HAYNES® 230® superalloys. |
| Databáze: | OpenAIRE |
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