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ASTM E 2472 : 2012 : R2018 : EDT 2

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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Standard Test Method for Determination of Resistance to Stable Crack Extension under Low-Constraint Conditions

Available format(s)

Hardcopy , PDF

Superseded date

17-04-2024

Language(s)

English

Published date

12-06-2023

€96.91
Excluding VAT

Committee
E 08
DocumentType
Test Method
Pages
26
ProductNote
Section A2.1.3 was editorially corrected in June 2023.
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

1.1This standard covers the determination of the resistance to stable crack extension in metallic materials in terms of the critical crack-tip-opening angle (CTOA), ψc and/or the crack-opening displacement (COD), δ5 resistance curve (1).2 This method applies specifically to fatigue pre-cracked specimens that exhibit low constraint (crack-size-to-thickness and un-cracked ligament-to-thickness ratios greater than or equal to 4) and that are tested under slowly increasing remote applied displacement. The test specimens are the compact, C(T), and middle-crack-tension, M(T), specimens. The fracture resistance determined in accordance with this standard is measured as ψc (critical CTOA value) and/or δ5 (critical COD resistance curve) as a function of crack extension. Both fracture resistance parameters are characterized using either a single-specimen or multiple-specimen procedures. These fracture quantities are determined under the opening mode (Mode I) of loading. Influences of environment and rapid loading rates are not covered in this standard, but the user must be aware of the effects that the loading rate and laboratory environment may have on the fracture behavior of the material.

1.2Materials that are evaluated by this standard are not limited by strength, thickness, or toughness, if the crack-size-to-thickness (a/B) ratio and the ligament-to-thickness (b/B) ratio are greater than or equal to 4, which ensures relatively low and similar global crack-front constraint for both the C(T) and M(T) specimens (2, 3).

1.3The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4This 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.

1.5This 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 E 3039 : 2020 Standard Test Method for Determination of Crack-Tip-Opening Angle of Ferritic Steels Using DWTT-Type Specimens
ASTM F 3122 : 2014 : R2022 Standard Guide for Evaluating Mechanical Properties of Metal Materials Made via Additive Manufacturing Processes
ASTM F 3439 : 2022 Additive manufacturing of metals — Finished part properties — Orientation and location dependence of mechanical properties for metal powder bed fusion
ASTM E 1823 : 2023 Standard Terminology Relating to Fatigue and Fracture Testing
ASTM E 1823 : 2024 : REV A Standard Terminology Relating to Fatigue and Fracture Testing

ASTM E 1820 : 2023 : REV B Standard Test Method for Measurement of Fracture Toughness
ASTM E 1823 : 2024 Standard Terminology Relating to Fatigue and Fracture Testing
ASTM E 8/E8M : 2024 Standard Test Methods for Tension Testing of Metallic Materials
ASTM E 1823 : 2024 : REV A Standard Terminology Relating to Fatigue and Fracture Testing
ASTM E 647 : 2023 Standard Test Method for Measurement of Fatigue Crack Growth Rates
ASTM E 647 : 2023 : REV B Standard Test Method for Measurement of Fatigue Crack Growth Rates
ASTM E 399 : 2023 Standard Test Method for Linear-Elastic Plane-Strain Fracture Toughness of Metallic Materials
ASTM E 8/E8M : 2022 Standard Test Methods for Tension Testing of Metallic Materials
ASTM E 647 : 2023 : REV A Standard Test Method for Measurement of Fatigue Crack Growth Rates
ASTM E 399 : 2022 Standard Test Method for Linear-Elastic Plane-Strain Fracture Toughness of Metallic Materials
ASTM E 1820 : 2023 : REV A Standard Test Method for Measurement of Fracture Toughness

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