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Journal of Materials Science

, Volume 34, Issue 19, pp 4645–4652 | Cite as

Fatigue crack propagation in aluminum nitride ceramics under cyclic compression

  • G. Subhash
  • S. M. Beesley
  • R. K. Govila
  • W. Rafaniello
Article

Abstract

Room temperature fatigue crack growth characteristics under cyclic compressive loads were investigated in pure and 3 wt % yttria doped hot pressed aluminum nitride ceramics. A single edge-notch specimen geometry was used to induce a stable Mode I fatigue crack under cyclic compressive loads. The fatigue crack growth occurred in three stages, where the first stage is dominated by microcrack nucleation, coalescence and slow growth within the notch root. During the second stage, the crack growth is accelerated and finally, the crack growth deceleration and arrest occurred in third stage. The fatigue crack growth occurred predominantly by intergranular fracture. Insights gained from the experimental results and microscopic observations are discussed.

Keywords

Fatigue Crack Yttria Fatigue Crack Growth Fatigue Crack Propagation Intergranular Fracture 
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

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • G. Subhash
    • 1
  • S. M. Beesley
    • 1
  • R. K. Govila
    • 2
  • W. Rafaniello
    • 3
  1. 1.Mechanical Engineering-Engineering Mechanics DepartmentMichigan Technological UniversityHoughton
  2. 2.Scientific Research LaboratoriesFord Motor CompanyDearborn
  3. 3.Ceramics and Advanced MaterialsThe Dow Chemical CompanyMidland

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