Characterising and representing small crack growth in an additive manufactured titanium alloy

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2 Citations (Scopus)

Abstract

The purpose of the research is to apply the modified Hartman-Schijve equation for predicting small crack growth rate in additive manufactured titanium Ti-6Al-4V. Material constants in the equation were determined by long crack test data, and the threshold of the stress intensity factor range was set to a small value. A small fatigue crack test was conducted to validate the fitted equation. Predicted fatigue life of another specimen configuration under bending load agreed well with the test result. The work shows that it may be possible to represent both small and long crack growth rates by the modified Hartman-Schijve equation with its material constants being determined by long crack test.
Original languageEnglish
Article number107876
JournalEngineering Fracture Mechanics
Volume253
Early online date10 Jul 2021
DOIs
Publication statusPublished - Aug 2021

Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in Engineering Fracture Mechanics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Engineering Fracture Mechanics, 253, (2021)
DOI: 10.1016/j.engfracmech.2021.107876

© 2021, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Funder

EPSRC

Keywords

  • small/short cracks
  • EIDS
  • surface roughness
  • durability
  • fracture mechanics
  • finite element analysis
  • WAAM
  • Ti-6Al-4V

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