Inhomogeneity Screening Criterion for the ASTM E1921 T0 Estimate Based on the SINTAP Lower-Tail Methodology

Kim R.W. Wallin

Research output: Contribution to journalArticle

2 Citations (Scopus)


The master curve brittle fracture toughness estimation method described in the ASTM E1921-11 test standard is based on a theoretical scatter and size effect assumption and makes use of a maximum likelihood estimation method to determine the fracture toughness transition temperature T0. The estimation method in E1921-11 is valid only for macroscopically homogeneous steels. If the steel is inhomogeneous, the maximum likelihood method applied in E1921-11 becomes unreliable. Here, a simple screening criterion, based on the SINTAP lower-tail estimation method, is proposed, and the efficiency and limitations of the criterion are shown for a variety of different types of inhomogeneity.
Original languageEnglish
Pages (from-to)867-874
JournalJournal of Testing and Evaluation
Issue number6
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed



  • master curve
  • inhomogeneity
  • screening criteria
  • SINTAP lower-tail method

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