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

Sebastian Lindqvist; Juha Kuutti

doi:10.1016/j.tafmec.2022.103558

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

Sebastian Lindqvist^*
, Juha Kuutti

^*Corresponding author for this work

BA4505 Structural integrity

Research output: Contribution to journal › Article › Scientific › peer-review

10 Citations (Scopus)

150 Downloads (Pure)

Abstract

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 language	English
Article number	103558
Journal	Theoretical and Applied Fracture Mechanics
Volume	122
DOIs	https://doi.org/10.1016/j.tafmec.2022.103558
Publication status	Published - 1 Dec 2022
MoE publication type	A1 Journal article-refereed

Funding

The research is part of project AMOS (Advanced Materials Characterisation for Structural Integrity) that is funded through SAFIR2022 (The Finnish Research Programme on Nuclear Power Plant Safety 2019-2022).

Keywords

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

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Cite this

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title = "Sensitivity of the Master Curve reference temperature T0 to the crack front curvature",

abstract = "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.",

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T1 - Sensitivity of the Master Curve reference temperature T0 to the crack front curvature

AU - Lindqvist, Sebastian

AU - Kuutti, Juha

PY - 2022/12/1

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N2 - 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.

AB - 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.

KW - ASTM E1921

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KW - Fracture toughness

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JO - Theoretical and Applied Fracture Mechanics

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M1 - 103558

ER -

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

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