Journal Published Online: 01 March 1981
Volume 9, Issue 2

Comparison of Methods for Fracture Toughness Determination in Steels



This study compares various test methods and estimation procedures that are available for determining the fracture toughness of steels. The ASTM Test for Plane-Strain Fracture Toughness of Metallic Materials (E 399), the energy rate test, and the multiple identical specimen crack growth resistance R curve test for elastic-plastic fracture toughness JIc determination are compared. Various formulations for plane-strain fracture toughness KIc and JIc estimation are also compared. Comparison of the test methods indicates that, for ductile steels, the multiple identical specimen R curve test is the most promising. It is suggested that the total areas be used for calculation of J from Rice's approximate formulation for three-point bend specimens of ductile steels and crack-contributed areas for brittle steel three-point bend specimens.

Author Information

Cobanoglu, MM
Atomic Energy of Canada, Ltd., Engineering Co., Reactor Development Branch, Sheridan Park Research Community, Mississauga, Ontario, Canada
Kardos, G
Carleton University, Ottawa, Ontario, Canada
Pages: 7
Price: $25.00
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Stock #: JTE11649J
ISSN: 0090-3973
DOI: 10.1520/JTE11649J