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Journal of Materials Science

, Volume 31, Issue 13, pp 3535–3539 | Cite as

Cyclic fatigue crack growth of SiCw/Y-TZP composites: long- and short-crack behaviour

  • Guo-Dong Zhan
  • Yi-Zeng Zhang
  • Tung-Sheng Yen
  • Jian-Lin Shi
Papers

Abstract

Cyclic fatigue crack growth behaviour has been investigated for 10 vol % SiCw/Y-TZP composites with grain sizes varying from 1.50–2.00 μm in a residual stress field. To investigate the effect of precracking procedure, cyclic fatigue tests were performed on unannealed specimens using the four-point bending method under two conditions: (a) with a sharp crack and precracking procedure, and (b) with a natural sharp flaw. For all specimens in both conditions, an overall V-shaped da/dN versus Kapp relation was obtained. However, for the specimens without precracking, the da/dN had an unusual dependence on the applied stress intensity, giving a zigzag V-shaped curve. Explanations for these different results for the two conditions are discussed in terms of crack-tip shielding effects and residual stress field.

Keywords

Residual Stress Stress Intensity Applied Stress Fatigue Test Growth Behaviour 
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.

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Copyright information

© Chapman & Hall 1996

Authors and Affiliations

  • Guo-Dong Zhan
    • 1
  • Yi-Zeng Zhang
    • 1
  • Tung-Sheng Yen
    • 1
  • Jian-Lin Shi
    • 1
  1. 1.Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiPeople’s Republic of China

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