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2011
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The Co-base super heat resisting alloy ECY768 is employed in gas turbine because of its high temperature strength and oxidation resistance. The prediction of fatigue life for superalloy is important for improving the efficiency. In this paper, low cycle fatigue tests are performed as variables of total strain range and temperature. The relations between strain energy density and number of cycle to failure are examined in order to predict the low cycle fatigue life of ECY768 super alloy. The lives predicted by strain energy methods are found to coincide with experimental data and results obtained from the Coffin-Manson method. The fatigue lives is evaluated using predicted by Coffin-Manson method and strain energy methods is compared with the measured fatigue lives at different temperatures. The microstructure observing was performed for how affect able to low-cycle fatigue life by increasing the temperature.
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참고문헌 (13)
참고문헌 신청
B. Tomkins / 1981 / Creep and Fatigue in High Temperature Alloys / Applied Science Pub
J. C. Runkle / 1978 / Fatigue Mechanisms / ASTM
J. Polak / 1991 / Cyclic Plasticity and Low Cycle Fatigue Life of Metals / Elsevier
J. A. Bannantine / 1990 / Fundamentals of Metal Fatigue Analysis / Prentice Hall
C. E. Feltner / 1961 / Micro Plastic Strain Hysteresis Energy as a criterion for Fatigue Fracture / Journal of Basic Engineering 1(1):15~22
J. C. Runkle / 1978 / Fatigue Mechanisms / ASTM
J. Polak / 1991 / Cyclic Plasticity and Low Cycle Fatigue Life of Metals / Elsevier
J. A. Bannantine / 1990 / Fundamentals of Metal Fatigue Analysis / Prentice Hall
C. E. Feltner / 1961 / Micro Plastic Strain Hysteresis Energy as a criterion for Fatigue Fracture / Journal of Basic Engineering 1(1):15~22
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