Evaluation of Low Cycle Fatigue Damage of Gas Turbine Blades Used for a Long Time 


Vol. 33,  No. 3, pp. 8-14, Jun.  2018
10.14346/JKOSOS.2018.33.3.8


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  Abstract

Ni-base superalloy has excellent resistance to extreme environments such as high temperatures and high stresses and are used as materials for large gas turbines. In this paper, the specimens were taken from the blade that were used for a long time, and their life span was studied by microstructure analysis and avoidance of cursing. The microstructural analysis of the specimens was carried out using a OM and SEM to observe the coarsening, carbides on gamma prime. Low-cycle fatigue tests were performed on new material and airfoil of long time-used blade. The test was conducted under various deformation conditions and temperature conditions of 760℃ and 870℃. The low cycle fatigue test was carried out using the Coffin-Manson equation and the fatigue life was predicted. After the test, crack path and fracture surface were analyzed using SEM.

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  Cite this article

[IEEE Style]

허인강 and 김재훈, "Evaluation of Low Cycle Fatigue Damage of Gas Turbine Blades Used for a Long Time," Journal of the Korean Society of Safety, vol. 33, no. 3, pp. 8-14, 2018. DOI: 10.14346/JKOSOS.2018.33.3.8.

[ACM Style]

허인강 and 김재훈. 2018. Evaluation of Low Cycle Fatigue Damage of Gas Turbine Blades Used for a Long Time. Journal of the Korean Society of Safety, 33, 3, (2018), 8-14. DOI: 10.14346/JKOSOS.2018.33.3.8.

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