Browse > Article
http://dx.doi.org/10.14346/JKOSOS.2018.33.3.8

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

Heo, In Kang (Department of Mechanical Engineering, Chungnam National University)
Kim, Jae Hoon (Department of Mechanical Engineering, Chungnam National University)
Publication Information
Journal of the Korean Society of Safety / v.33, no.3, 2018 , pp. 8-14 More about this Journal
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 $760^{\circ}C$ and $870^{\circ}C$. 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.
Keywords
Ni-base superalloy; low cycle fatigue; microstructure; gamma prime; scanning electron microscopy(SEM);
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 C. T. Sims and W. C. Hagel, John Wiley and Sons, Superalloy II. New York, 1987.
2 J. C. Runkle and R. M. Pellous, Fatigue Mechanisms, ASTM STP 675, 1978.
3 J. H. Yoo, "A Study of Strain Waveform Effect on Fatigue Life in High Temperature Low Cycle Fatigue Test", J. Korean Soc. Saf., Vol. 14, No. 1, pp. 41-48, 1999.
4 H. Y. Yang, J. H. Kim, J. S. Ha, K. B. Yoo and G. C. Lee, "Low Cycle Fatigue Behavior of Cobalt-Base Superalloy ECY768 at Elevated Temperature", J. Korean Soc. Saf., Vol. 28, No. 3, pp. 18-22, 2013.   DOI
5 S. P. Zhu, H. Z., Huang, H. Li, R. Sun and M. J. Zuo, "A New Ductility Exhaustion Model for High Temperature Low Cycle Fatigue Life Prediction of Turbine Disk Alloys", International Journal of Turbo and Jet Engines, Vol. 28, No. 2, pp. 119-131, 2011.   DOI
6 S. H. Yang, M.. Y. Kim, S. Y. Park and S. H. Kim, "Effect of Heat Treatment on Microstructure and Mechanical Properties of the Nickel Base Superalloy GTD111DS", Journal of the Korean Society for Precision Engineering, Vol. 26, No. 3, pp.19-24, 2009.
7 J. Y. Kim, D. H. Yoon, J. H., Kim, S. Y. Bae, S. Y. Chang and S, H. Chang, "Life Prediction of Low Cycle Fatigue for Ni-base Superalloy GTD 111 DS at Elevated Temperature", Transations of the Korean Society of Mechanical Engineers A, Vol. 41, No. 8, pp.765-770, 2017.
8 J. A. Bannantine, J. J. Comer and J. L. Handrock, "Fundamentals of Metal Fatigue Analysis", Englewood Cliffs, NJ: Prentice-Hall, 1990.
9 L. J. Chen, P. K. Liaw, Y. H. He, M. L. Benson, J. W. Blust, P. F. Browning and D. L. Klarstrom, "Tensile Hold low-cycle Fatigue Behavior of Cobalt-based $HAYNES^{(R)}$ 188 superalloy", Scripta materialia, Vol. 44, No. 6, pp. 859-865, 2001.   DOI
10 B. H. Choe, J. H. Lee, H. M. Kim and H. C. Lee, "Low Cycle Fatigue Properties of Polycrystalline and Directionally Ssolidified CM247LC Superalloy", Korean Journal of Metals and Material Vol. 29, No. 6, pp. 618-625, 1991.
11 D. Hollander, D. Kulawinski, A. Weidner, M. Thiele, H. Biermann and U. Gampe, "Small-scale Specimen Testing for Fatigue Life Assessment of Service-exposed Industrial Gas Turbine Blades", International Journal of Fatigue, Vol. 92, pp.262-271, 2016.   DOI
12 M. Reger and L. Remy, "High Temperature, Low Cycle Fatigue of IN-100 Superalloy I: Influence of Temperature on the Low Cycle Fatigue Behaviour", Materials Science and Engineering A, Vol. 101 pp. 47-54, 1988.   DOI
13 J. Reuchet and L. Remy, "High Temperature Low Cycle Fatigue of MAR-M 509 Superalloy I: The Influence of Temperature on the Low Cycle Fatigue Behaviour from 20 to $1100^{\circ}C$", Materials Science and Engineering A, Vol. 58 pp. 19-32, 1983.