Advertisement

Journal of Materials Science

, Volume 29, Issue 16, pp 4167–4176 | Cite as

Effect of inclusion orientation upon acoustic emission-microstructural relationships in ferritic steels

  • C. B. Scruby
  • H. N. G. Wadley
Papers

Abstract

A comparison of the acoustic emission, mechanical properties and fracture behaviour of three model low-alloy steels containing manganese sulphide inclusions of varying orientation has been made as a function of tempering conditions. The majority of the inclusions existed in elliptical clusters whose major axis was aligned with the rolling direction and whose plane lay on the rolling plane. Both the yield region acoustic emission activity and ductility in the through-thickness (short transverse) sample orientation were reduced compared with the longitudinal, and to a lesser extent, transverse orientation samples. These effects are shown to be a consequence of inter-inclusion cluster shear localization in material of high yield stress and low work-hardening capacity. Because of the wide range of yield strengths and work-hardening capacities used in this study, the results extend our insight of the interactions between inclusion distribution, stress state and work-hardening capacity during ductile fracture of this class of materials.

Keywords

Acoustic Emission Ductile Fracture Ferritic Steel Yield Region Rolling Plane 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    H. N. G. Wadley and C. B. Scruby, J. Mater. Sci. 26 (1991) 5777.CrossRefGoogle Scholar
  2. 2.
    C. B. Scruby and H. N. G. Wadley, ibid. 28 (1993) 2501.CrossRefGoogle Scholar
  3. 3.
    H. N. G. Wadley and C. B. Scruby, ibid. 28 (1993) 2517.CrossRefGoogle Scholar
  4. 4.
    H. N. G. WADLEY, in “Acoustic Emission: A Quantitative NDE Technique for the Study of Fracture,” Proceedings of ONR Symposium on Solid Mechanics Research for QNDE, North Western University, 1985.Google Scholar
  5. 5.
    H. N. G. Wadley, D. C. Furze, C. B. Scruby and B. L. Eyre, Metal Sci. 13 (August 1979) 451.CrossRefGoogle Scholar
  6. 6.
    A. S. Argon, J. Im and R. Safoglu, Met. Trans. 6A (1975) 825.CrossRefGoogle Scholar
  7. 7.
    D. M. Tracey, Eng. Fract. Mech. 3 (1971) 301.CrossRefGoogle Scholar
  8. 8.
    M. Saje, J. Pan and A. Needleman, Int. J. Fract. 19 (1982) 163.CrossRefGoogle Scholar
  9. 9.
    A. Needleman and J. R. Rice, in “Mechanisms of Sheet Metal Forming”, edited by D. P. Koistinen and N-M Wang, (Plenum, New York, 1978) p. 237.CrossRefGoogle Scholar
  10. 10.
    J. W. Hutchinson and T. Tvergaard, in “Fracture Mechanics: Perspectives and Directions (Twentieth Symposium)”, ASTM STP 1020, edited by R. P. Wei and R. P. Gangloff (American Society for Testing and Materials, Philadelphia, 1989) p. 61.CrossRefGoogle Scholar

Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • C. B. Scruby
    • 1
  • H. N. G. Wadley
    • 1
  1. 1.AEA Industrial Technology, Harwell LaboratoryAEA TechnologyDidcotUK

Personalised recommendations