Alloy 690TT samples with four kinds of surface states were prepared: 1) ground to 400 grit; 2) ground to 1500 grit; 3) mechanically polished (MP) and 4) electro-polished (EP). The surface morphologies and the surface skin layers0 microstructures of these samples were characterized systematically using various methods and the effects of surface states on the oxidation behaviours of Alloy 690TT were also discussed. The results showed that surface roughness and micro-hardness decreased gradually from the ground to EP surfaces. The grains in the near-surface layers of the ground and MP surfaces had been refined and the residual strains were also very high. The dislocations on the ground surfaces were mainly parallel dislocation lines. The thickness of the superficial cold-worked layers decreased gradually from the ground surfaces to polished surfaces. The oxide morphologies and oxidation rate depended greatly on the surface states of samples. Cold-working by grinding treatments could benefit the outward diffusion of metallic atoms and the nucleation of surface oxides and then accelerate the growth of surface oxide films.
参考文献
| [1] | R.S. Dutta: J. Nucl. Mater., 2009, 393, 343.[2 ] S.J. Lee and J.J. Lai: J. Mater. Process. Technol., 2003, 140, 206.[3 ] S.E. Ziemniak, M. Hanson and P.C. Sander: Corros. Sci., 2008, 50, 2465.[4 ] F.J. Meng, J.Q. Wang, E.H. Han and W. Ke: Corros. Sci., 2009, 51, 2761.[5 ] P. Berge: Mater. Perform., 1997, 36, 56.[7 ] S. Wang, Y. Takeda, K. Sakaguchi and T. Shoji: Corrosion, 2006, 62, 651.[7 ] S.Wang, T. Shoji and N. Kawaguchi: Corrosion, 2005, 61, 137.[8 ] S.L. Hong: Corrosion, 2001, 57, 323.[9 ] J.M. Boursier: Stress Corrosion Cracking of NickelBased Alloys in Primary Water of Pressurized Water Reactors, Ph.D. Thesis, University of Bordeaux I, 1993.[10] F. Scenini, R.C. Newman, R.A. Cottis and R.J. Jacko: Corrosion, 2008, 64, 824.[11] D.H. Hur, M.S. Choi, D.H. Lee, M.H. Song, S.J. Kim and J.H. Han: Nucl. Eng. Des., 2004, 227, 155.[12] I.G. Park: Nucl. Eng. Des., 2002, 212, 395.[13] M. Warzee, J. Hennaut, M. Maurice, C. Sonnen, J. Waty and P. Berge: J. Electrochem. Soc., 1964, 112, 670.[14] C. Ostwald and H.J. Grabke: Corros. Sci., 2004, 46, 1113.[15] F. Scenini, R.C. Newman, R.A. Cottis and R.J. Jacko: Corrosion, 2007, 07611.[16] L. Tan, X. Ren, K. Sridharan and T.R. Allen: Corros. Sci., 2008, 50, 2040. [17] F. Carrette, L. Guinard and B. Pieraggi: in 9th Int. Conf. on Water Chemistry of Nuclear Reactors Systems, Thomas Telford Ltd., London, UK, 2002. [18] E. Moleiro, F. Carrette, J.M. Boursier and L. Legras: in 10th Int. Conf. on Water Chemistry of Nuclear Reactors Systems, Thomas Telford Ltd., London, UK, 2004, 139.[19] F. Carette, M.C. Lafont, G. Chatainier, L. Guinard and B. Pieraggi: Surf. Interf. Anal., 2002, 34, 135.[20] S. Ahn, V. S. Rao, H. Kwon and U. Kim: Corros. Sci., 2006, 48, 1137.[21] S. Carlsson and P.L. Larsson: Acta Mater., 2001, 49, 2179.[22] G.K. Williamson and W.H. Hall: Acta Metall., 1953, 1, 22.[23] N.R. Tao, Z.B. Wang, W.P. Tong, M.L. Sui, J. Lu and K. Lu: Acta Mater., 2002, 50, 4603.[24] M.L. Suominen Fuller, R.J. Klassen, N.S. McIntyre, A.R. Gerson, S. Ramamurthy, P.J. King and W. Liu: J. Nucl. Mater., 2008, 374, 482.[25] H.P. Klug and L.E. Alexander: X-ray Diffraction Procedures for Polycrystalline and Amorphous Materials, Wiley, New York, 1974, 661.[26] Z.Q. Yang and U. Welzel: Mater. Lett., 2005, 59, 3406.[27] L. Guinard, O. Kerrec, D. Noel, S. Gardey and F. Coulet: Proceedings of the Water Chemistry of Nuclear Reactor Systems 7, British Nuclear Energy Society, Bournemouth, 1996, 62.[28] W. Li and D.Y. Li: Acta Mater., 2006, 54, 445.[29] W. Li and D.Y. Li: Appl. Surf. Sci., 2005, 240, 388.[30] G.M. Raynaud and R.A. Rapp: Oxid. Met., 1984, 21, 89. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%