Accessible Requires Authentication Published by De Gruyter March 1, 2013

On the creep resistance in cast Ni-base superalloys

C. Yuan and J. T. Guo

Abstract

In this paper, we attempt to apply the modified hardening theory to estimate the creep resistance, which is considered as a key factor for controlling the creep deformation mechanism in cast nickel-base superalloys. It is suggested that, when the applied stress is high enough for the dislocations to cut into the γ′ particles, the creep resistance is almost a constant and independent of applied stress. At low applied stress, creep deformation is mainly controlled by dislocations climb, where the creep resistance has two components of a threshold stress and a friction stress. The model is verified for two cast nickel-base superalloys DZ17G and IN738. The results of detailed calculations are in good agreement with the experimental data.


2 Correspondence address: Dr. Yuan Chao, Institute of Metals Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, P.R. China, Tel.: +862423971930, Fax: +862483978045. E-mail:

References

[1] E.W.Ross, C.T.Sims, in: C. T.Sims, N. S.Stoloff, W. C.Hagel (Eds.), Superalloys II, John Wiley & Sons, New York(1987)97. Search in Google Scholar

[2] W.Betteridge, S.W.K.Shaw: Mater. Sci. Technol.3(1987)682.10.1179/026708387790329847 Search in Google Scholar

[3] B.B.Seth, in: T.M.Pollock, R.D.Kissinger, R.R.Bowman, K. A.Green, M.McLean, S.Olson, J.J.Schirra (Eds.), Superalloys 2000, TMS, Warrendale, PA(2000)3.10.7449/2000/Superalloys_2000_3_16 Search in Google Scholar

[4] E.H.Miller, W.L.Chambers, in: C. T.Sims, N. S.Stoloff, W. C.Hagel (Eds.), Superalloys II, John Wiley & Sons, New York(1987)27. Search in Google Scholar

[5] F.R.N.Nabarro, H.L.de Villiers: The Physics of Creep, Taylor & Francis, London(1995). Search in Google Scholar

[6] R.A.Stevens, P.E.J.Flewitt: Mater. Sci. Eng.A37(1979)237. Search in Google Scholar

[7] B.Reppich, in: H.Mughrabi (Ed.), Plastic Deformation and Fracture of Materials, VCH, Weinheim(1993). Search in Google Scholar

[8] J.Weertman, J.R.Weertman, in: S.L.Anderson (Ed.), Constitutive Relations and Their Physical Basis, Risø National Lab., Denmark(1987)191. Search in Google Scholar

[9] W.Blum: Z. Metallkd.68(1977)484. Search in Google Scholar

[10] J.C|vadek: Creep in Metallic Materials, Elsevier, Amsterdam(1988). Search in Google Scholar

[11] J.P.Dennison, P.D.Holmes, B.Wishire: Mater. Sci. Eng.33(1978)35.10.1016/0025-5416(78)90151-9 Search in Google Scholar

[12] J.C.Gibeling, D.Nix: Mater. Sci. Eng.45(1980)123.10.1016/0025-5416(80)90218-9 Search in Google Scholar

[13] R.A.Stevens, P.E.J.Flewitt: Acta Metall.29(1981)867.10.1016/0001-6160(81)90129-2 Search in Google Scholar

[14] M.McLean: Acta Metall.33(1985)545.10.1016/0001-6160(85)90018-5 Search in Google Scholar

[15] R.W.Evans, B.Wilshire: Creep of Metals and Alloys, The Institute of Metals, London(1985). Search in Google Scholar

[16] G.C.Davies, D.R.H.Jones: Scripta Metall.35(1996)523.10.1016/1359-6462(96)00165-0 Search in Google Scholar

[17] L.M.Brown, R.K.Ham, in: A.Kelly, R.B.Nicholson (Eds.), Strengthening Methods in Crystals, Applied Science, London(1971)9. Search in Google Scholar

[18] E.Nembach, G.Neite: Prog. Mater. Sci.29(1985)177.10.1016/0079-6425(85)90001-5 Search in Google Scholar

[19] A.J.Ardell: Metall. Trans.A16(1985)2131. Search in Google Scholar

[20] R.B.Schwarz, R.Labusch: J. Appl. Phys.49(1978)5174.10.1063/1.324413 Search in Google Scholar

[21] B.Reppich: Acta Metall.30(1982)87.10.1016/0001-6160(82)90048-7 Search in Google Scholar

[22] B.Reppich, P.Schepp, G.Wehner: Acta Metall.30(1982)95.10.1016/0001-6160(82)90049-9 Search in Google Scholar

[23] B.Reppich, W.Kühlein, G.Merer, D.Puppel, M.Schulz, G.Schumann: Mater. Sci. Eng.83(1986)45.10.1016/0025-5416(86)90173-4 Search in Google Scholar

[24] S.Schanzer, E.Nembach: Acta Metall. Mater.40(1992)803.10.1016/0956-7151(92)90022-7 Search in Google Scholar

[25] C.Yuan, J.T.Guo, H.C.Yang, S.H.Wang: Scripta Mater.39(1998)991.10.1016/S1359-6462(98)00255-3 Search in Google Scholar

[26] J.T.Guo, C.Yuan, H.C.Yang, V.Lupinc, M.Maldini: Metall. Mater. Trans.A32(2001)1103.10.1007/s11661-001-0121-y Search in Google Scholar

[27] P.J.Henderson, M.McLean: Acta Metall.31(1983)1203.10.1016/0001-6160(83)90182-7 Search in Google Scholar

[28] J.Guo, D.Ranucci, E.Picco, P.M.Strocchi: Metall. Trans.A14(1983)2329. Search in Google Scholar

[29] T.M.Pollock, A.S.Argon: Acta Metall.40(1992)1.10.1016/0956-7151(92)90195-K Search in Google Scholar

[30] M.Feller-Kniepmeier, G.Scheunemann-Frerker: Phil. Mag.A62(1990)77. Search in Google Scholar

[31] G.Eggeler, A.Dlouhy: Acta Mater.45(1997)4251.10.1016/S1359-6454(97)00084-0 Search in Google Scholar

[32] R.Srinivasan, G.F.Eggeler, M.J.Mills: Acta Mater.48(2000)4867.10.1016/S1359-6454(00)00292-5 Search in Google Scholar

[33] R.S.W.Shewfelt, L.M.Brown: Phil. Mag.35(1977)945.10.1080/14786437708232636 Search in Google Scholar

[34] D.Mukherji, R.P.Wahi: Acta Metall.44(1996)1529. Search in Google Scholar

Received: 2005-07-20
Accepted: 2005-10-10
Published Online: 2013-03-01
Published in Print: 2006-02-01

© 2006, Carl Hanser Verlag, München