1.1 This test method covers procedures and guidelines for the determination of fracture toughness of metallic materials using the following parameters: K, J, and CTOD (δ). Toughness can be measured in the R-curve format or as a point value. The fracture toughness determined in accordance with this test method is for the opening mode (Mode I) of loading. NOTE 1—Until this version, KIc could be evaluated using this test method as well as by using Test Method E399. To avoid duplication, the evaluation of KIc has been removed from this test method and the user is referred to Test Method E399.
1.2 The recommended specimens are single-edge bend, [SE(B)], compact, [C(T)], and disk-shaped compact, [DC(T)]. All specimens contain notches that are sharpened with fatigue cracks.
1.2.1 Specimen dimensional (size) requirements vary according to the fracture toughness analysis applied. The guidelines are established through consideration of material toughness, material flow strength, and the individual qualification requirements of the toughness value per values sought. NOTE 2—Other standard methods for the determination of fracture toughness using the parameters K, J, and CTOD are contained in Test Methods E399, E1290, and E1921. This test method was developed to provide a common method for determining all applicable toughness parameters from a single test.
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM E1820-23 Referenced Document
ASTM E1290 Standard Test Method for Crack-Tip Opening Displacement (CTOD) Fracture Toughness Measurement
ASTM E1823 Standard Terminology Relating to Fatigue and Fracture Testing
ASTM E1921 Standard Test Method for Determination of Reference Temperature, To, for Ferritic Steels in the Transition Range
ASTM E1942 Standard Guide for Evaluating Data Acquisition Systems Used in Cyclic Fatigue and Fracture Mechanics Testing
ASTM E21 Standard Test Methods for Elevated Temperature Tension Tests of Metallic Materials
ASTM E2298 Standard Test Method for Instrumented Impact Testing of Metallic Materials
ASTM E23 Standard Test Methods for Notched Bar Impact Testing of Metallic Materials
ASTM E399 Standard Test Method for Plane-Strain Fracture Toughness of Metallic Materials
ASTM E4 Standard Practices for Force Verification of Testing Machines
ASTM E8/E8M Standard Test Methods for Tension Testing of Metallic Materials*, 2024-01-01 Update
ASTM E1820-23 history
2023ASTM E1820-23b Standard Test Method for Measurement of Fracture Toughness
2023ASTM E1820-23a Standard Test Method for Measurement of Fracture Toughness
2023ASTM E1820-23 Standard Test Method for Measurement of Fracture Toughness
2022ASTM E1820-22e1 Standard Test Method for Measurement of Fracture Toughness
2022ASTM E1820-22 Standard Test Method for Measurement of Fracture Toughness
2021ASTM E1820-21 Standard Test Method for Measurement of Fracture Toughness
2020ASTM E1820-20b Standard Test Method for Measurement of Fracture Toughness
2020ASTM E1820-20ae1 Standard Test Method for Measurement of Fracture Toughness
2020ASTM E1820-20a Standard Test Method for Measurement of Fracture Toughness
2020ASTM E1820-20e1 Standard Test Method for Measurement of Fracture Toughness
2020ASTM E1820-20 Standard Test Method for Measurement of Fracture Toughness
2018ASTM E1820-18ae1 Standard Test Method for Measurement of Fracture Toughness
2018ASTM E1820-18a Standard Test Method for Measurement of Fracture Toughness
2018ASTM E1820-18 Standard Test Method for Measurement of Fracture Toughness
2017ASTM E1820-17a Standard Test Method for Measurement of Fracture Toughness
2017ASTM E1820-17 Standard Test Method for Measurement of Fracture Toughness
2016ASTM E1820-16 Standard Test Method for Measurement of Fracture Toughness
2015ASTM E1820-15ae1 Standard Test Method for Measurement of Fracture Toughness
2015ASTM E1820-15a Standard Test Method for Measurement of Fracture Toughness
2015ASTM E1820-15 Standard Test Method for Measurement of Fracture Toughness
2013ASTM E1820-13e1 Standard Test Method for Measurement of Fracture Toughness
2013ASTM E1820-13 Standard Test Method for Measurement of Fracture Toughness
2011ASTM E1820-11e2 Standard Test Method for Measurement of Fracture Toughness
2011ASTM E1820-11e1 Standard Test Method for Measurement of Fracture Toughness
2011ASTM E1820-11 Standard Test Method for Measurement of Fracture Toughness
2009ASTM E1820-09e1 Standard Test Method for Measurement of Fracture Toughness
2009ASTM E1820-09 Standard Test Method for Measurement of Fracture Toughness
2008ASTM E1820-08a Standard Test Method for Measurement of Fracture Toughness
2008ASTM E1820-08 Standard Test Method for Measurement of Fracture Toughness
2006ASTM E1820-06e1 Standard Test Method for Measurement of Fracture Toughness
2006ASTM E1820-06 Standard Test Method for Measurement of Fracture Toughness
2005ASTM E1820-05a Standard Test Method for Measurement of Fracture Toughness
2005ASTM E1820-05 Standard Test Method for Measurement of Fracture Toughness
2001ASTM E1820-01 Standard Test Method for Measurement of Fracture Toughness
2001ASTM E1820-99a Standard Test Method for Measurement of Fracture Toughness