Hostname: page-component-745bb68f8f-cphqk Total loading time: 0 Render date: 2025-02-05T21:32:57.177Z Has data issue: false hasContentIssue false
  • English
  • Français

Modeling Dislocation Dissociation and Cutting of γ′ Precipitates in Ni-Based Superalloys by the Phase Field Method

Published online by Cambridge University Press:  11 February 2011

Chen Shen ,
Michael J. Mills  and
Yunzhi Wang
Chen Shen
Affiliation:
Dept. of Materials Science and Engineering, Ohio State University, Columbus, OH 43210
Michael J. Mills
Affiliation:
Dept. of Materials Science and Engineering, Ohio State University, Columbus, OH 43210
Yunzhi Wang
Affiliation:
Dept. of Materials Science and Engineering, Ohio State University, Columbus, OH 43210
Get access

Abstract

We incorporate γ-surface data of both γ and γ′ phases from ab initio calculations into the phase field model to study dislocation dissociation and interaction with γ′ particles in Ni-based superalloys. Through three examples we demonstrate the unique capabilities of the model in characterizing the core structure of a dissociated superdislocation in γ′ phase, the creation and annihilation of planar defects such as CSF and APB caused by dislocation cutting through the γ′ phase and the interplay between the cutting and looping mechanisms.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 753: Symposium BB – Defect Properties and Related Phenomena in Intermetallic Alloys , 2002 , BB5.21
Copyright
Copyright © Materials Research Society 2003

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

1. Nabarro, F.R.N. and Duesbery, M., in Dislocations in Solids, edited by Nabarro, F.R.N. and Duesbery, M. (Elsevier, Amsterdam, 1996).Google Scholar
2. Srinivasan, R., Eggeler, G.F. and Mills, M.J., Acta mater. 48, 4867 (2000)Google Scholar
3. Wang, Y.U., Jin, Y.M., Cuitino, A.M. and Khachaturyan, A.G., Acta mater. 49, 1847 (2001)Google Scholar
4. Khachaturyan, A.G., in The Science of Alloys for the 21st Century: A Hume-Rothery Symposium Celebration, edited by Turchi, P.E.A., Shull, R.D. and Gonis, A. (TMS, St. Louis, MO, 2000) pp. 293–308.Google Scholar
5. Jin, Y.M. and Khachaturyan, A.G., Phil. Mag. Lett. 81, 607 (2001)Google Scholar
6. Wang, Y.U., Jin, Y.M., Cuitino, A.M. and Khachaturyan, A.G., Phil. Mag. 81, 385 (2001)Google Scholar
7. Shen, C. and Wang, Y., Acta mater. (2002) (submitted).Google Scholar
8. Shen, C. and Wang, Y., (2003) (to be submitted).Google Scholar
9. Nabarro, F.R.N., in Theory of Crystal Dislocations, edited by (Dover publications, Inc., New York, 1987).Google Scholar
10. Wang, Y.U., Jin, Y.M. and Khachaturyan, A.G., J. Appl. Phys. 92, 1351 (2002)Google Scholar
11. Christian, J.W. and Vitek, V., Rep. Prog. Phys. 33, 307 (1970)Google Scholar
12. Cahn, J.W. and Hilliard, J.E., J. Chem. Phys. 28, 258 (1958)Google Scholar
13. Schoeck, G., Phil. Mag. A 81, 1161 (2001)Google Scholar
14. Schoeck, G., Kohlhammer, S. and Fähnle, M., Phil. Mag. Lett. 79, 849 (1999)Google Scholar
15. Kohlhammer, S., PhD. Thesis, University of Stuttgart, 2001.Google Scholar
16. Hartford, J., Sydow, B.V., Wahnström, G. and Lundqvist, B.I., Phys. Rev. B 58, 2487 (1998)Google Scholar
17. Zimmerman, J.A., Gao, H. and Abraham, F.F., Modelling Simul. Mater. Sci. Eng. 8, 103 (2000)Google Scholar
18. Kayser, F. and Stassis, C., Phys. stat 64, 335 (1981)Google Scholar
19. Bulatov, V.V. and Kaxiras, E., Phys. Rev. Lett. 78, 4221 (1997)Google Scholar