Microstructural and load hold effects on small fatigue crack growth in α+β dual phase Ti alloys

S. Hémery, J. C. Stinville

Research output: Contribution to journalArticlepeer-review


Microstructurally small crack growth was monitored in Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo with equiaxed and bi-modal microstructures. The influence of the microstructure was assessed to obtain an improved understanding of the lifetime variability observed in Ti alloys. Primary α grains, basal plane cracking and misalignment across boundaries were identified as key features for high crack growth rates. The origin of life debits encountered under dwell-fatigue loadings was also investigated through crack growth monitoring with the introduction of load holds at peaks stress. Dwell periods were found to induce a substantial small crack acceleration.

Original languageEnglish (US)
Article number106699
JournalInternational Journal of Fatigue
StatePublished - Mar 2022


  • Dwell-fatigue
  • Fatigue crack growth
  • Low cycle fatigue
  • Microstructure
  • Titanium alloys

ASJC Scopus subject areas

  • Modeling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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