Journal Published Online: 01 September 2012
Volume 40, Issue 6

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

CODEN: JTEVAB

Abstract

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.

Author Information

Wallin, Kim
VTT Technical Research Centre of Finland, FI
Pages: 8
Price: $25.00
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Details
Stock #: JTE104241
ISSN: 0090-3973
DOI: 10.1520/JTE104241