Affiliation:
1. KEPCO Research Institute
2. Korean Electric Power Institute
3. Chungnam National University
Abstract
The rotating components in the hot sections of land-based gas turbine are exposed to severe environment during several ten thousand hours at above 1100 oC operating temperature. The failure mechanism of the hot gas components would be accompanied by material degradation in the properties of high temperature and creep rupture strength. Many hot gas components in gas turbine are made of Ni-based superalloy because of their high temperature performance. In this work, we surveyed the time and temperature dependent degradation of Ni-based superalloy. We prepared the specimens from GTD111 that are exposed at 871 oC and 982 oC in 1,000 ~ 10,000 hours. We carried out the mechanical test and microstructural observation.
Publisher
Trans Tech Publications, Ltd.
Reference5 articles.
1. M. Durand-Charre : The Microstructure of Superalloys, CRC Press (1997).
2. J.X. Yang, Q. Zheng, X.F. Sun, H.R. Guan and Z.Q. Hu : Topologically closed-packed phase precipitation in a nickel-base superalloy during thermal exposure, Materials Science and Engineering A 465, 100-108 (2007).
3. C.T. Sims, N.S. Stoloff and W.C. Hagel : Superalloys Ⅱ, John Wiley & Sons (1987).
4. B.G. Choi, I.S. Kim, D.H. Kim and C.Y. Jo : Temperature dependence of Mcdecompisition behavior in Ni-based superalloy GTD111, Materials Science and Engineering A 468, 329-335 (2008).
5. G. E. Dieter : Mechanical Metallurgy, McGraw-Hill (1986).
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