Fatigue crack propagation mechanisms in a thermally aged duplex stainless steel

T.J. Marrow, J.E. King

Research output: Contribution to journalArticlepeer-review

Abstract

Zeron 100 duplex stainless steel is susceptible to embrittlement following ageing at temperatures between 350 °C and 450 °C. The embrittlement is associated with cleavage of the age-hardened ferrite phase, initiated by deformation twinning. This can result in order of magnitude increases in the fatigue crack propagation rate. The effects of ageing on the mechanisms of fatigue crack propagation in Zero 100 are investigated, and a quantitative model is developed, accounting for the effects of hardness, temperature, stress level and microstructure on the fatigue crack growth rate. © 1994.
Original languageEnglish
Pages (from-to)91-101
Number of pages11
JournalMaterials Science and Engineering A
Volume183
Issue number1-2
DOIs
Publication statusPublished - 15 Jun 1994

Keywords

  • aging of materials
  • crack propagation
  • deformation
  • embrittlement
  • fatigue of materials
  • ferrite
  • hardness
  • mathematical models
  • metallographic microstructure
  • stresses
  • thermal effects
  • twinning
  • cleavage
  • ferrite phase
  • thermal aging
  • Zeron 100 duplex steel
  • ageing
  • fatigue cracks
  • stainless steel

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