Hostname: page-component-8448b6f56d-qsmjn Total loading time: 0 Render date: 2024-04-19T17:18:32.581Z Has data issue: false hasContentIssue false
  • English
  • Français

Film Effects On Ductile/Brititle Behavior In Stress-Corrosion Cracking

Published online by Cambridge University Press:  15 February 2011

Tong-Yi Zhang ,
Wu-Yang Chu  and
Ji-Mei Xiao
Tong-Yi Zhang
Affiliation:
Department of Mechanical Engineering, Center for Advanced Engineering Materials, Hong Kong University of Science and Technology, Kowloon, Hong Kong
Wu-Yang Chu
Affiliation:
Department of Materials Physics, Beijing University of Science and Technology, Beijing 100083, P.R. China
Ji-Mei Xiao
Affiliation:
Department of Materials Physics, Beijing University of Science and Technology, Beijing 100083, P.R. China
Get access

Abstract

The present work analyzes the effects of a passive film formed during stress corrosion cracking on ductile/brittle fracture behavior, considering the interaction of a screw dislocation with a thin film-covered mode III crack under an applied remote load. Exact solutions are derived, and the results show that the crack stress field due to the applied load is enhanced by a harder film or abated by a softer film. The critical stress intensity factor for dislocation emission from the crack tip is greatly influenced by both the stiffness and thickness of the filn. A dislocation is more easily to be emitted from the crack tip if the covered film has a shear modulus larger than that of the substrate. The opposite is also true, i.e., a softer film makes dislocation emission more difficult. Both phenomena become more significant when the film thickness is smaller.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 409: Symposium Q – Fracture-Instablility Dynamics, scaling and Ductile/Brittle Behavior , 1995 , 207
Copyright
Copyright © Materials Research Society 1996

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. Parkins, R.N., JOM, December issue (1992) p.12–19.Google Scholar
2. Jones, R.H. and Ricker, R.E., in “Stress-Corrosion Cracking” ed. Jones, R.H., ASM International (1992) p. 1–40.Google Scholar
3. Sieradzki, K. Acta Metall. 30, p.973 (1982).Google Scholar
4. Scanmans, G.M. and Swann, P.R., Corros. Sci. 18, p. 983 (1978).Google Scholar
5. Sieradzki, K. and Newman, R.C., Phil. Mag. A51, p. 95 (1985).Google Scholar
6. Sieradzki, K. and Newman, R.C., J. Phys. Chem. Solids 48, p. 1101 (1987).Google Scholar
7. Zhang, Tong-Yi and Qian, Cai-Fu, Interaction of a screw dislocation with a thin filmcovered mode III crack, unpublished work.Google Scholar
8. Qian, Cai-Fu and Zhang, Tong-Yi, Interaction of a dislocation with a thin film-covered crack, unpublished work.Google Scholar
9. Beltz, G.E. and Rice, J.R., Acta Metall. Mater. 40, p. S321 (1992).Google Scholar
10. Rice, J.R. and Thomson, R., Phil. Mag. 29, p. 73 (1974).Google Scholar
11. Lin, I.H. and Thomson, R., Acta Metall. 34, p. 187 (1986).Google Scholar