Hostname: page-component-78c5997874-v9fdk Total loading time: 0 Render date: 2024-11-04T21:18:19.972Z Has data issue: false hasContentIssue false
  • English
  • Français

Directional Coarsening of γ′ Phase Induced by Phase Transformation Stress

Published online by Cambridge University Press:  03 March 2011

K. Zhao ,
Y.H. Ma ,
L.H. Lou  and
Z.Q. Hu
K. Zhao*
Affiliation:
Institute of Metal Research, Graduate School of the Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
Y.H. Ma
Affiliation:
Institute of Metal Research, Graduate School of the Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
L.H. Lou
Affiliation:
Institute of Metal Research, Graduate School of the Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
Z.Q. Hu
Affiliation:
Institute of Metal Research, Graduate School of the Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
*
a) Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

It was found that directional coarsening was induced by phase transformation stress due to non-uniform distribution of μ phase in an experimental nickel-based superalloy. The mechanism based on the existing diffusion and coherency strain energy theory has been discussed. It was concluded that directional coarsening was the course of dissolving of γ′ portion with high free energy, diffusing and growing on the existed γ′ particles along a preferential direction.

Keywords

AlloySecond phasesPhase transformation
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 9 , September 2005 , pp. 2314 - 2321
Copyright
Copyright © Materials Research Society 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1Socrate, S. and Parks, D.M.: Numerical determination of the elastic driving force for directional coarsening in Ni-superalloys. Acta Metall. Mater. 41, 2185 (1993).CrossRefGoogle Scholar
2Pollock, T.M. and Argon, A.S.: Directional coarsening in nickel-base single crystals with high volume fractions of coherent precipitates. Acta Metall. Mater. 42, 1859 (1994).CrossRefGoogle Scholar
3Nabarro, F.R.N.: Rafting of superalloys. Metall. Mater. Trans. 27A, 513 (1996).CrossRefGoogle Scholar
4Kamaraj, M., Mayr, C., Kolbe, M. and Eggeler, G.: On the influence of stress state on rafting in the single crystal superalloy CMSX-6 under conditions of high temperature and low stress creep. Scripta Mater. 38, 589 (1998).CrossRefGoogle Scholar
5Henderson, P., Berglin, L. and Jansson, C.: On rafting in a single crystal nickel-base superalloy after high and low temperature creep. Scripta Mater. 40, 229 (1999).CrossRefGoogle Scholar
6Mantan, N., Cox, D.C., Rae, C.M.F. and Reed, R.C.: On the kinetics of rafting in CMSX-4 superalloy single crystals. Acta Mater. 47, 2031 (1999).CrossRefGoogle Scholar
7Svetlov, I.L., Golovko, B.A., Epishin, A.I. and Abalakin, N.P.: Diffusional mechanism of γ′–phase particles coalescence in single crystals of nickel-base superalloys. Scripta Metall. Mater. 26, 1353 (1992).CrossRefGoogle Scholar
8Saito, M., Aoyama, T., Hidaka, K., Tamaki, H., Ohashi, T., Nakamura, S. and Suzuki, T.: Concentration profiles and the rafting mechanism of Ni base superalloys in the initial stage of high temperature creep tests. Scripta Mater. 34, 1189 (1996).CrossRefGoogle Scholar
9Chen, W. and Immarigeon, J.P.: Thickening behavior of γ′ precipitates in nickel base superalloys during rafting. Scripta Mater. 39, 167 (1998).CrossRefGoogle Scholar
10Prikhodko, S.V. and Ardell, A.J.: Coarsening of in Ni–Al alloys aged under uniaxial compression: I. Early-stage kinetics. Acta Mater. 51, 5001 (2003).CrossRefGoogle Scholar
11Prikhodko, S.V. and Ardell, A.J.: Coarsening of in Ni–Al alloys aged under uniaxial compression: II. Diffusion under stress and retardation of coarsening kinetics. Acta Mater. 51, 5013 (2003).Google Scholar
12Muller, L., Glatzel, U. and Feller-Kniepmeier, M.: Calculation of the internal stresses and strains in the microstructure of single crystal nickel-base superalloy during creep. Acta Metall. Mater. 41, 3401 (1993).CrossRefGoogle Scholar
13Tian, S.G., Cheng, C.R., Yong, H.C. and Hu, Z.Q.: Finite element analysis of driving force of γ′–phase directional coarsening for a single crystal nickel-base superalloy during high temperature creep. Acta Metall. Sinica 36, 465 (2000).Google Scholar
14Gayda, J. and Mackay, R.A.: Analysis of γ′ shape changes in a single crystal Ni-base superalloy. Scripta Metall. 23, 1835 (1989).CrossRefGoogle Scholar
15Gayda, J. and Srolovitz, D.J.: A Monte Carlo-finite element model for strain energy controlled microstructural evolution: “Rafting” in superalloys. Acta Metall. 37, 641 (1989).CrossRefGoogle Scholar
16Muller, L., Glatzel, U. and Feller-Kniepmeier, M.: Modelling thermal misfit stresses in nickel-base superalloys containing high volume fraction of γ′ phase. Acta Metall. 40, 1321 (1992).CrossRefGoogle Scholar
17Ganghoffer, J.F., Hazotte, A., Denis, S. and Simon, A.: Finite element calculation of internal mismatch stresses in a single crystal nickel base superalloy. Scripta Metall. 25, 2491 (1991).CrossRefGoogle Scholar
18Muller, L., Link, T. and Feller-Kniepmeier, M.: Temperature dependence of the thermal lattice mismatch in a single crystal nickel-base superalloy measured by neutron diffraction. Scripta Metall. 26, 1297 (1992).CrossRefGoogle Scholar
19Feng, H., Biermann, H. and Mughrabi, H.: Computer simulation of the initial rafting process of a nickel-base single-crystal superalloy. Metall. Mater. Trans. 31A, 585 (2000).CrossRefGoogle Scholar
20Ichitsubo, T., Koumoto, D., Hirao, M., Tanaka, K., Osawa, M., Yokokawa, T. and Harada, H.: Rafting mechanism for Ni-base superalloy under external stress: Elastic of elastic-plastic phenomena. Acta Mater. 51, 4683 (2003).CrossRefGoogle Scholar
21Zhu, J. and Ye, H.Q.: On the microstructure and its diffraction anomaly of the μ phase in superalloys. Scripta Metall. Mater. 24, 1861 (1990).CrossRefGoogle Scholar
22Zhao, K., Lou, L.H., Wen, Y., Li, H. and Hu, Z.Q.: Nucleation and growth of μ phase. J. Mater. Sci. 39, 369 (2004).CrossRefGoogle Scholar
23Xiao, J.M.: Phase and Phase Transformation, 1st ed. (Metallurgical Press of Technology, Beijing, China, 1987), p. 68.Google Scholar
24ASM Phase and Transformation (A Seminar of the American Society for Metals, Metal Park, OH, 1970), p. 233.Google Scholar
25Hultgren, R., Desai, P.D., Hawkins, D.T. and Gleiser, N.: Selected Values of Thermodynamic Properties of Binary Alloys (ASM, Metals Park, OH, 1973).Google Scholar
26Smith, C.J.: Metal Reference Book, 5th ed. (Butterworths, London, U.K., 1976), p. 186.Google Scholar
27Weast, R.C.: Handbook of Chemistry and Physics (CRC, Boca Raton, FL, 1984).Google Scholar
28Ke, T.S.: Internal Friction Theory in Solids, 1st ed. (Science Press, Beijing, People’s Republic of China, 2000), p. 3.Google Scholar