Acta Metallurgica Sinica (English Letters) >
Thermo-mechanical fatigue behavior of nickel-base powder metallurgy superalloy FGH96 under tension-tension loading
Received date: 2009-10-12
Revised date: 2010-01-13
Online published: 2010-04-08
Thermo-mechanical fatigue (TMF) behavior of FGH96, a nickel-base powder metallurgy superalloy, has been studied under tension-tension loading at the temperature range from 550℃ to 720℃. The results show that TMF fracture mode is intergranular for the in-phase (IP), but transgranular cleavage-like for the out-of-phase (OP) samples. The total content of Al, Ti and Nb in the γ' phases for the IP or OP samples and the partitioning ratio of γ'/γ in these elements for the IP samples are relatively higher at the lower strain amplitude, which is consistent with the case of the γ' size that is larger at the lower strain amplitude, the lattice parameter misfit is negative and the absolute value is lower at the lower strain amplitude that is correlative with the change of the γ' morphology. The deformation at the lower strain amplitude is mainly dominated by the dislocation lines and dislocation pairs in the matrix channels, at the higher strain amplitude dominated by the large numbers of superlattice stacking faults within the γ' phases.
GU Yu-Li . Thermo-mechanical fatigue behavior of nickel-base powder metallurgy superalloy FGH96 under tension-tension loading[J]. Acta Metallurgica Sinica (English Letters), 2010 , 23(2) : 147 -153 . DOI: 10.11890/1006-7191-102-147
[1] X.M. Zhou, D.L. Wang and Y. Wang, Failure Anal Prevent 3 (2008) 24.
[2] G.D. Zhang, S.L. Liu and Y.H. He, Failure Anal Prevent 3 (2008) 54.
[3] F.J. Liu, M.C. Zhang and J.X. Dong, Acta Metall Sin(Engl Lett) 20 (2007) 102.
[4] J.T. Liu, G.Q. Liu and B.F. Hu, J Univ Sci Technol Beijing 13 (2006) 319.
[5] G.F. Tian, C.C. Jia and Y. Wen, J Univ Sci Technol Beijing 15 (2008) 729.
[6] G.B. Viswanathan, P.M. Sarosi, D.H. Whitis and M.J. Mills, Mater Sci Eng A 400-401 (2005) 489.
[7] S. Pahlavanyali, G. Drew and A. Rayment, Mater Sci Technol 23 (2007) 1454.
[8] F. Pyczak, B. Devrient and F.C. Neuner, Acta Mater 53 (2005) 3879.
[9] J.Y. Hwang, R. Banerjee, J. Tiley and R. Srinivasan, Metall Mater Trans A: Phys Metall Mater Sci 40 (2009) 41.
[10] Y. Tadaharu, O. Makoto and N. Kenji, J Jpn Inst Met 68 (2004) 138.
[11] A. Royer, A. Jacques and P. Bastie, Mater Sci Eng A 319-321 (2001) 800.
[12] J.X. Zhang, J.C. Wang and H. Harada, Acta Mater 53 (2005) 4623.
[13] Y.C. Wang, S.X. Liu and S.H. Ai, Acta Metall Sin 39 (2003) 337 (in Chinese).
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