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| CREEP-FATIGUE INTERACTION BEHAVIORS AND LIFE PREDICTIONS FOR THREE SUPERALLOYS |
| CHEN Lijia; WU Wei; P. K. Liaw |
| 沈阳工业大学 |
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Cite this article:
CHEN Lijia; WU Wei; P. K. Liaw. CREEP-FATIGUE INTERACTION BEHAVIORS AND LIFE PREDICTIONS FOR THREE SUPERALLOYS. Acta Metall Sin, 2006, 42(9): 952-958 .
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Abstract The low-cycle fatigue tests with tensile hold times ranging from 0 to 60 min were conducted for 3 superalloys, HAYNES 188, HAYNES 230 and HASTELLOY X, at 816 ℃ and
927 ℃ under a total strain range control mode to investigate their creep-fatigue interaction behaviors. It was found that under creep-fatigue loading condition, the strain fatigue lives of the three superalloys are dependent on the type of the alloy, duration of strain hold, and test temperature. The different strain fatigue life
behaviors exhibited by the three superalloys are related to the difference in the damages from creep and oxidation. In addition, the frequency-modified tensile hysteresis energy modeling was used to correlate the present strain fatigue life data. The result showed that this modeling could give a satisfactory prediction on the creep-fatigue lives of the three superalloys.
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Received: 23 December 2005
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