Low Cycle Fatigue Life Evaluation According to Temperature and Orientation in Nickel-Base Superalloy

In Kang Heo; Dong Hyun Yoon; Jae Hoon Kim

doi:10.4028/www.scientific.net/KEM.814.121

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 814Low Cycle Fatigue Life Evaluation According to...

Low Cycle Fatigue Life Evaluation According to Temperature and Orientation in Nickel-Base Superalloy

Abstract:

Components of gas turbines must be extremely resistant to high temperatures, high stresses, high-temperature corrosion, and erosive environments. The materials used in these environmental conditions are mainly nickel-based superalloys. In this study, the low-cycle fatigue of the nickel-based superalloy Inconel 792 was examined. The total strain range of a gas turbine between 760 °C and 870 °C was considered as the parameter representing the actual gas turbine operation. In addition, tests were performed using a trapezoidal waveform of the total strain to reflect the operation-stop conditions of a gas turbine with frequent shutdowns. The results of the fatigue test were compared with the Coffin–Manson method and energy method. The fractured surface was analyzed using a scanning electron microscope (SEM).

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Advanced Materials and Engineering Materials VIII

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Periodical:

Key Engineering Materials (Volume 814)

Pages:

121-126

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.814.121

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Online since:

July 2019

Authors:

In Kang Heo, Dong Hyun Yoon, Jae Hoon Kim*

Keywords:

Elevated Temperature, Low Cycle Fatigue, Nickel-Base Superalloy, Orientation

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* - Corresponding Author

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