Sensitivity of the Master Curve reference temperature T0 to the crack front curvature

Sebastian Lindqvist (Corresponding Author), Juha Kuutti

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)
34 Downloads (Pure)


ASTM E1921 is a testing standard to determine the fracture toughness for ferritic steels in the ductile-to-brittle transition range. If the crack front curvature criterion in the standard is not fulfilled, the result is invalid, and more testing is required. However, previous investigations do not focus on quantifying the effect of curvature on Master Curve reference temperature, T0. The numerical and experimental analyses done in this study indicate that, for increasing crack front curvatures, the effect of curvature on T0 is marginal and the obtained T0 tends to provide a conservative estimate. Future investigations on large experimental data sets with the methods provided in this study would help to quantify the trends more in detail. The results contribute to the development of more cost-efficient testing methods and impact long-term operation of nuclear power plants.
Original languageEnglish
Article number103558
JournalTheoretical and Applied Fracture Mechanics
Publication statusPublished - 1 Dec 2022
MoE publication typeA1 Journal article-refereed


  • ASTM E1921
  • Crack front curvature
  • Ductile-to-brittle transition
  • Fracture toughness


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