The effect of phase angle on crack growth mechanisms under thermo-mechanical fatigue loading

J. Jones, M. Whittaker, R. Lancaster, C. Hyde, J. Rouse, B. Engel, S. Pattison, S. Stekovic, C. Jackson, H.y. Li

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
131 Downloads (Pure)

Abstract

The current paper describes TMF crack growth behaviour in an advanced nickel-based superalloy. Changes in behaviour are examined which occur as a function of the phase angle between applied stress and temperature. The fractography of the failed specimens reveals changes from transgranular to intergranular growth between high and low phase angle tests as a result of the onset of high temperature damage mechanisms. More targeted testing has also been undertaken to isolate the contributions of these mechanisms, with specific transitions in behaviour becoming clear in 90° diamond cycles, where dynamic crack growth and oxidation strongly interact.
Original languageEnglish
Article number105539
Pages (from-to)1-12
Number of pages12
JournalInternational Journal of Fatigue
Volume135
Early online date16 Feb 2020
DOIs
Publication statusPublished - Jun 2020

Keywords

  • thermo-mechanical fatigue
  • phase angle
  • creep
  • oxidation

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