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Uncertainty Quantification of the Ductile-Brittle Transition Temperature T0 of 16mnd5 Steel from Experimental and Numerical Fracture Toughness Tests

SSRN, ISSN: 1556-5068
2024
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Metric Options:   Counts1 Year3 Year

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  • Usage
    230
    • Abstract Views
      202
    • Downloads
      28
  • Captures
    1
    • Readers
      1
      • SSRN
        1

Article Description

The Master Curve methodology, standardized ASTM E1921, provides a direct characterization of the ductile-brittle transition temperature T0. Guaranteeing an accurate estimation of T0 is a major challenge due to its sensitivity to various parameters, including test matrix (number of specimens, test temperatures) and geometry configuration (dimensions, precrack front). This dependence is all the more significant with the new miniaturized mini-CT specimens. This paper discusses requirements of ASTM E1921 standard and gives recommendations for different specimen sizes. The analyses are based on finite element analysis, Beremin cleavage fracture model and Monte Carlo simulations to quantify the statistical dispersion of T0 estimates. The main conclusions provide recommendations for a more accurate estimation of T0 and suggestions for updating the standard requirements. These include recommendations on the number of tests, the estimation of standard deviation, a suggested new test temperature range for mini-CTs, an extended range of dimensional imperfections, and updates to precrack front specifications.

Bibliographic Details

Anthony Quintin; Rudy Chocat; Tom Petit; Cécile Mattrand; Jean Marc Bourinet

Elsevier BV

Multidisciplinary; ASTM E1921; Ductile-brittle transition temperature; Master curve; Mini-CT; Fracture toughness

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