Direct observation of three-dimensional short fatigue crack closure behavior in Ti-6Al-4V alloy using ultra-high-resolution X-ray microtomography

Valary Tubei, Hiroyuki Toda, Worapol Ketanond, Hiro Fujihara, Osamu Takakuwa, Akihisa Takeuchi, Masayuki Uesugi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Local 3D short fatigue crack closure behavior was investigated in Ti-6Al-4V alloy using ultra-high-resolution X-ray microtomography (XMT). The results show that the inhomogeneous distribution of plasticity-induced and roughness-induced crack closure is caused by the variation of crack path morphologies. These crack path morphologies exhibited heterogeneous plastic deformation at the crack-tips due to the anisotropic nature of α grains and varying extents of crack tilting and twisting caused by the interaction of the crack front with α/α boundary or α/α + β interface. It was revealed via surrogate-based statistical analysis that the Schmid factor has the strongest effect on crack growth rate.

Original languageEnglish
Article number107428
JournalInternational Journal of Fatigue
Volume168
DOIs
Publication statusPublished - Mar 2023

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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