Hostname: page-component-6bf8c574d5-gr6zb Total loading time: 0 Render date: 2025-02-20T14:22:45.177Z Has data issue: false hasContentIssue false
  • English
  • Français

A Universal Criterion for Amortization in Metallic Systems

Published online by Cambridge University Press:  25 February 2011

D. T. Kulp ,
T. Egami ,
D. E. Luzzi  and
V. Vitek
D. T. Kulp
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104.
T. Egami
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104.
D. E. Luzzi
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104.
V. Vitek
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104.
Get access

Abstract

Recent computer simulation studies of electron-bombarded metallic alloys have concentrated on finding a criterion for amorphization. It has been suggested that the thermodynamic properties of volume and total energy can be used as a gauge for defect induced amorphization. Our simulation results indicate that these properties can not be used due to their dependence on processing history. We propose that the distribution of the atomic level shear stresses can be used as this amorphization criterion. Using Finnis-Sinclair type many-body potentials and Lennard-Jones pair potentials, molecular dynamics (MD) simulations on several model systems have been performed. By quantifying the analysis using the average shear stress normalized, by the average shear modulus of the glass, we will present evidence that the crystal becomes amorphous at the defect concentration where the normalized average shear stress reaches a critical value, which is equivalent to the state obtained through quenching from the liquid.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 279: Symposium A – Beam-Solid Interactions–Fundamentals and Applications , 1992 , 505
Copyright
Copyright © Materials Research Society 1993

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

1. Hsieh, H. and Yip, S., Physical Review Letters 59 (24), 2760 (1987).Google Scholar
2. Limoge, Y., Rahman, A., Hsieh, H., and Yip, S., Journal of Non-Crystalline Solids 99, 75 (1988).CrossRefGoogle Scholar
3. Hsieh, H. and Yip, S., Physical Review B 39 (11), 7476 (1989).CrossRefGoogle Scholar
4. Massobrio, C., Pontikis, V., and Martin, G., Physical Review B 41 (15), 10486 (1990).Google Scholar
5. Sabochick, M.J. and Lam, N.Q., Atomistic Simulation of Radiation-Induced Amorphization of the B2 Ordered Intermetallic Compound NiTi, in The Materials Research Society Fall Meeting, Boston (1990).Google Scholar
6. Sabochick, M.J. and Lam, N.Q., Scripta Metallurgica et Materialia 24, 565 (1990).Google Scholar
7. Sabochick, M.J. and Lam, N.Q., Physical Review B 43 (7), 5243 (1991).CrossRefGoogle Scholar
8. Shoemaker, J.R., Lutton, R.T., Wesley, D., Wharton, W.R., Oehrli, M.L., Herte, M.S., Sabochick, M.J., and Lam, N.Q., Journal of Materials Research 6 (3), 473 (1991).Google Scholar
9. Lam, N.Q., Sabochick, M.J., and Okamoto, P.R., Radiation-induced amorphization of intermetallic compounds. A molecular dynamics study of CuTi and CU4Ti3. in IEA Workshop on The Use of Molecular Dynamics in Modelling Radiation Effects and Other Nonequilibrium Phenomena., La Jolla, CA (1991)Google Scholar
10. Kulp, D.T., Egami, T., Luzzi, D.E., and Vitek, V., (submitted to Journal of Alloys and Compounds).Google Scholar
11. Kulp, D.T., Egami, T., Luzzi, D.E., and Vitek, V., Journal of Non-Crystalline Solids (in press).Google Scholar
12. Massobrio, C. and Pontikis, V., Physical Review B 45 (5), 2484 (1992).CrossRefGoogle Scholar
13. Egami, T., Maeda, K., and Vitek, V., Philosophical Magazine A 41 (6), 883 (1980).Google Scholar
14. Vitek, V. and Egami, T., Physica Status Solidi (b) 144, 145 (1987).CrossRefGoogle Scholar
15. Egami, T. and Srolovitz, D., Journal of Physics F: Metal Physics 12, 2141 (1982).Google Scholar
16. Chen, S.-P., Egami, T., and Vitek, V., Physical Review B 37 (5), 2440 (1988).Google Scholar
17. Srolovitz, D., Vitek, V., and Egami, T., Acta Metallurgica 31 (2), 335 (1983).Google Scholar
18. Lennard-Jones, J.E. and Ingram, A.E., Proceedings of the Royal Society A A107, 636 (1925).Google Scholar
19. Finnis, M.W. and Sinclair, J.E., Philosophical Magazine A 50 (1), 45 (1984).CrossRefGoogle Scholar
20. Srolovitz, D., Maeda, K., Takeuchi, S., Egami, T., and Vitek, V., Journal of Physics F: Metal Physics 11, 2209 (1981).Google Scholar
21. Egami, T. and Waseda, Y., Journal of Non-Crystalline Solids 64, 113 (1984).Google Scholar