Journal of Materials Science

, Volume 17, Issue 2, pp 499–507 | Cite as

The influence of crack depth on the fatigue crack propagation rate for a marine steel in seawater

  • B. F. Jones
Papers

Abstract

It has been shown that, for QIN steel specimens tested in seawater at a zero-tension cyclic frequency of 30 cycles per hour, crack growth rates are influenced by crack depth at low values of the stress intensity range (ΔK). Crack growth rates are faster for shallow cracks in the crack depth range 0.5 to 2.0 mm when ΔK is less than about 30 MN m−3/2. For deeper cracks at low stress intensity ranges and for all crack depths at high stress intensity ranges, crack depth does not exert a significant influence on crack growth rate. The implications of such factors in relation to the provision of corrosion fatigue crack growth rate data for use in engineering design are discussed.

Keywords

Fatigue Crack Crack Growth Rate Fatigue Crack Growth Fatigue Crack Propagation Fatigue Crack Growth Rate 

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Copyright information

© Chapman and Hall Ltd 1982

Authors and Affiliations

  • B. F. Jones
    • 1
  1. 1.Materials DepartmentAdmiralty Marine Technology EstablishmentPooleUK

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